Stuck bosses. ASA v94.22 (06/10/2026) fixed some bosses becoming unresponsive at low server FPS. The Manticore will not land if survivors bring any shoulder pets or flying tames into the arena, and light pets can make it bug and stay in the air.
Loot. ASA fixed the Megapithecus reward crate sometimes not spawning (33.49) and, on The Center, problems when one twin boss was harvested before the second was killed (51.3). On The Island, the Dragon could aggro on structures and creatures above its arena (61.37).
Tekgrams and levels. Tek items require defeating bosses. Beating a higher difficulty unlocks all lower-tier Tekgrams of that boss, and no single map gives every Tekgram. On Astraeos the Manticore gives Tekgrams and extra levels, but you must respawn before they show up; on Ragnarok both bosses must die. Engrams, once earned, stay through death and transfers. In July 2025 Studio Wildcard listed boss engrams not being rewarded as a known issue of the then-new ASE build; our ASE maps run the earlier pre-Aquatica build.
Ascension. An ascension usually uploads the character (Astraeos's does not), so Element and any other item that cannot be transferred is lost, and a long-standing bug can make even transferable items disappear when the character is downloaded. Ascending a lower difficulty after a higher one glitches the character's profile. The wiki lists The Center, Ragnarok, Valguero, Crystal Isles, Lost Island and Fjordur as maps where ascension is impossible. ASA fixed character loss during ascension in v93.19 (04/09/2026), and the Manticore page warns of occasional issues ascending while mounted.