For the Regidrago raids, the raids are un-joinable with error 32. They fixed this error with 1 minute left, before the raid despawned. Thanks to u/Jimmy-The-Squid on TSR for the report, the catch circle was also too small as the sizing is incorrect. This was fixed after about an hour because Niantic never finished making the Pokemon in the game so it was missing all its camera, collision, and other settings. Niantic announced a makeup day the next day for the time zone that had these issues. However the 11 am timeslot for the Americas had several issues, such as raids not loading, people getting kicked out of raids if they could join at all, but several people couldn't join, not being able to catch, and several other network issues. The makeup day also experienced the exact same issues as the first day. Niantic eventually acknowledged this 6 days later and said there would be a makeup, but hasn't said anything since.

Niantic's known issues described the bug as 'Issue description: Pokémon attracted to Daily Adventure Incense caught using a PGP or PBP will not appear on the summary screen or count towards Special Research.' and that it was fixed in 247. It was fixed for the summary screen, but not for special research. This has not been acknowledged.

This has been an issue since they launched, but there have been continued reports of spawns disappearing when another egg appears in the same cell, or spawns disappearing when tapped, or not spawning at all. For the most part, it does work as advertised, but there are some rough edges that still need to be ironed out. Niantic did report this issue was fixed, but there are still reports of issues.

After launching the Powered Up Pokestop feature in beta for a short while, they released it worldwide. One of Level 3's rewards was a bonus Pokemon spawn around the stop or gym once fully powered up, but after this feature was rolled out worldwide, trainers discovered this feature was broken. When you would load the map with one of these spawns active, it would prevent your map from loading, as well as preventing you from catching Pokemon. Niantic responded by temporarily disabling that bonus, with intentions to fix it. They disabled it around December 10th, 2021 and it has not been re-enabled since.

In the 215 release notes, Niantic said 'Fixed bug causing Trainer avatar to appear to the side of the Gym screen when a large-sized Pokémon is placed as a Gym defender.' In 217 this broke again and has not been acknowledged since.

A costumed Raid Boss during a special event will lose its costume if it is caught after the event ends, even if the Raid Battle takes place right before the end time of the event. This issue actually appeared on the Niantic "Known Issues" tracker, and was removed in October 2021, but was never fixed (or was broken again after it was fixed). Pokemon still lose their costumes if caught after the special event ends.

Mega Pokemon do not have feeding animations when feeding in Buddy Adventure. This was acknowledged by Niantic as an issue but nothing has been done since to fix it.

Niantic made an update shortly after COVID began to move incense Pokemon away from the trainer when they spawned. This worked for a few updates, but then broke and hasn't been acknowledged since. The date is an approximation as we aren't sure exactly when it broke.

If you have buddy Pokemon you have fed a Poffin to it will lose the Poffin buff regardless of time remaining at midnight.

Like Pidgey before, it has no wings. Probably been broken since the Unity 2021 update. This was fixed at some point but we weren't sure when.

By doing a raid or rocket, then tapping on a wild Pokemon with remember the last ball enabled, the premier ball comes up. If you try to catch the Pokemon with it, it runs (but just visually).

Some Android devices are crashing on 269 when they boot up. Fresh installs or going back to 267 appear to be the workarounds. Niantic acknowledged they are looking into it.

At the end of the Blanche event, everyone's special research reset if they didn't complete it. Niantic acknowledged this issue and promptly auto-completed people's research to get based this step for them.

Niantic has not pushed the assets for Blanche Lapras causing the encounter to error when loading that encounter, making it uncatchable.

Niantic forgot to re-roll new quests for April. They eventually realized this and fixed it on April 3th.

The Willow ticket can not be gifted and shows as the GO fest ticket in players' inventory. This was fixed to be giftable on the 1st, but it was using the wrong sprite. They fixed the sprite the next day.

Gimmighoul's stats were copy and pasted from other Mons without being checked, so it is very broken. Wrong buddy/walked stats, wrong evo requirements, wrong third move, probably wrong BCR and BFR, wrong sizing, and more. This has been partially fixed but some issues still remain.

Since 261, there is a high chance the game will freeze when claiming a Scatterbug from the pop-up notification. Niantic has not acknowledged this issue but there were no reports of this since .3.

Since 261, the friend list's avatars appear to be double rendered, and moving left to right in your friends list info screen glitches for a second and shows you the previous friend's avatar and buddy. Niantic has not acknowledged this issue but it doesn't appear to happen since .3.

In 261, raids can become unresponsive with taps not showing and your Mon standing still. It appears to still be doing damage, but your second charge move won't charge and your first charge move won't fire. If your Mon faints, you can be stuck in an unresponsive state for 30+ seconds. This appears to happen randomly, from reports about 1/5 raids. From further reports, it appears to be triggered when you use a Mon with a second charge move, where the second move won't charge/fire, and then the other issues start. Niantic never acknowledged this issue, but there haven't been reports of it in a while so marking as fixed.

When Niantic pushed the new Mega settings for Primals, they broke the ability to use search filters like `mega1`, `mega2`, etc. Niantic removed the text for the new Pokedex which fixed this issue.

Niantic launched the Battle Party feature on December 7th, 2017. At that time, they announced Battle Party syncing between devices. It never came. Several years later, they announced that Battle Party sync was now available, but it was never activated. The feature is still not active today.

Like the friends list, the quest stamps are double rendered, making it difficult to tell if you have completed your stamp for the day or not. This was fixed in 261.1.

For the most part Kecleon was a successful rollout without any game breaking bugs. There were a few issues, some of which Niantic has acknowledged. They include: It uses Meltan's cry (not acknowledged), it has no gender so it was disabled being sent to HOME, sometimes it doesn't appear on the map after being attacked, and Niantic says this is an issue - you can see Kecleon when outside the stop's radius. The cry and gender has been fixed and on Jan 31 they re-enabled HOME sending.