All the bugs I encounter:
1. Sometimes, during a firefight with an enemy, the character suddenly draws a pistol unnecessarily. I manage to fire 2-4 rounds and then start switching weapons in the face of the enemy for no apparent reason.
2. The game often spawns me in a different location than I designated. This could be an ally out of combat, a vehicle (full or damaged), or a spawn point (in any condition).
3. The spawn map sometimes drifts off-center, and half the spawn points are invisible (a rare bug).
4. In Season 4, I noticed the bomb disappearing in Obliteration mode.
5. The game crashes to the desktop, without errors (a rare bug).
That's all I can remember for now. Add your stories and bugs in the comments.