To very quickly add onto the 1 HP gym glitch, when that happened to me and I closed and re-opened the app, I found that none of the damage my pokemon took had been saved. I'm certainly not complaining about this, but I figured I'd make not of it in case anyone experienced similarly or differently.
Glitch: I faced a glitch several time. This occured during a wild Pokemon encounter. As soon as a pokeball is thrown, the Pokemon goes inside the pokeball and then, the pokeball does not shake. Neither does it go ahead. Just remains as it until the app is shut.
probable solution: close the app and restarting the game works just fine.
Sometimes the ball doesn't shake when you catch a Pokemon and that freezes the game. You may wanna make a note of it.
I can confirm that both of these have happened to me as well during multiple occasions. However, unlike Lt. Bleu, most of my catches were registered when I re-opened the app, leading me to believe that whether or not you successfully capture the pokemon is determined when you throw the ball.
I've also touched upon a couple of other glitches I've experienced in some other threads, so I'll post them here as well (and elaborate as necessary):
As for your Tauros, it's very possible that you were experiencing a glitch (likely due to miscommunication with the server) that essentially "freezes" your listed nearby pokemon (if I had to take a guess, I'd say that the frozen list is inaccurate as well). I've had this happen to me a couple of times before, and each time I closed the app and re-opened it to fix the problem. Nearby pokemon don't reset if you log out and in again unless they were never nearby to begin with or they naturally moved away.
To expand upon this, when I say "freeze" I mean that the nearby pokemon list doesn't update, no matter how far I travel. The game itself is not frozen and can register pokestops, gyms, and incense encounters.
I've had a number of bugs/crashes while playing GO, but now that the server situation seems to be improving a little, my biggest frustration is with trying to battle at gyms.
I wasn't going to ignore it and assume it was nothing, but I have three times tried to challenge a gym, and each time nothing happens. I hit 'go' on the main gym screen the arena screen appears with our pokemon on it, it says "Battle!" "Go!" then sends me right back to the gym screen?
I've had this problem as well. Even when the "Go!" finally works, the gym battle itself glitches out and I can barely see my own pokemon, let alone the pokemon I'm trying to fight. Both times I've had to forfeit and retry, where it worked the second time (I should note that both times it appears I had AR for the gym battles active, although the AR only activated after I forfeited and retried).
I want to also quickly note that sometimes the battle doesn't even load at all, and I have to close the app and re-open it.
I feel it's also probably worth mentioning that the situation where I can't see either pokemon in battle (they seem to be severely elevated and justified either left or right) seems to be similar to a glitch I've seen a couple of times when evolving a pokemon, where in the status screen after evolution the pokemon is elevated upwards to the point that it's overtop of the CP number. It's not a big deal and corrects itself if you exit and re-enter the status screen, but could possibly suggest that it, alongside the gym glitch, is a malfunction within the game data itself (or perhaps a combination of both).
And finally, some more miscellaneous glitches:
I find that sometimes, when the servers are acting up, even if I can log into the game, hardly anything loads. My trainer can still move around with relative accuracy, but no pokestops or gyms show up, no wild pokemon show up, and the trainer data in the bottom left-hand corner is incorrect, set to about 60% exp completion and a generic blue outline, even if I've already picked a team. If I bring up my trainer info, the badges and number of pokecoins is correct, but the area were my trainer should be is completely black, my exp bar is completely empty, and my level doesn't show up. If I click on my pokemon or eggs, nothing will show up and if I click on my items only the camera shows up. If I remember correctly, the dex is completely empty as well. The shop sometimes loads, but other times it's a completely white screen.
Dovetailing into that, sometimes the shop experiences its own glitches, even if the game itself is working. There have been occasions where the shop won't load and is stuck on a white screen. I can exit out of it just fine, and I've noticed it typically happens in bad coverage areas. Other times, after I make a microtransaction, even though the transaction was a success, my coin total does not change. If I try to buy anything that I would be able to afford after the transaction but can't afford with the non-updated total, the game won't let me. Even if I exit out of the shop or catch a pokemon, the coin total does not change. It only updates after I close and re-open the app.
For some smaller nuisances, sometimes the game completely freezes up. I can't tell you specifically what causes this, as it's happened at multiple, seemingly random occasions. While my trainer can move around, I can't click on anything at all. Even if I minimize the app and re-open it, the game is still frozen. I have to close the app and re-open it for it to work. It's worth noting that each time this has happened to me, it was immediately followed by the servers being down, indicating that there might be a link there.
Other times, the game randomly closes. For me, it seems to happen on completely random instances and thankfully hasn't happened very often, but I have a friend who's game, on the first day, would consistently close each time he caught a pokemon.
Finally, I've noticed that there's a bit of a delay in processing a level up. While the exp bar switches to your new level and everything is displayed properly, the game doesn't do its flashy level-up animation and give you your level-up bonuses until you get any amount of exp after you've leveled up. It's not a big deal, but I thought it was worth mentioning.
Please keep in mind that unless otherwise specified, this has only happened in my game and I do not speak for everyone else's experience! ;u; Will edit and update with more glitches if I remember/encounter any more! (I'm terribly sorry this is such a long post)