This particular bug seems quite hard to replicate and seems to happen quite seldom, assumedly because of how the timing has to be just right (at least that's my impression on how the bug works). In one case, the boss for 3350 seemed to spawn right as I died, so it didn't reset and I was fighting boss 3350 on wave 3340. I died to that boss just stayed on wave 3340, and then spawned a normal wave. Another time, I died and the bullets shot by the enemies of that wave stayed on screen (unsure if they spawned as I died).
This particular bug seems quite hard to replicate and seems to happen quite seldom, assumedly because of how the timing has to be just right (at least that's my impression on how the bug works). In one case, the boss for 3350 seemed to spawn right as I died, so it didn't reset and I was fighting boss 3350 on wave 3340. I died to that boss just stayed on wave 3340, and then spawned a normal wave. Another time, I died and the bullets shot by the enemies of that wave stayed on screen (unsure if they spawned as I died).