Wardens do not despawn (dig) and lost his brain memory (emptied)

### Expected behavior Will post the same content as on the Mojira report. Opening a case there after eternity advise to do so (even tho it was replicated on Vanilla Server). I would assume this to be a low priority bug, could probably be fixed on Paper side. Also waiting in seeing how Mojang confirm this as a bug or not. - All Wardens should despawn after their cooldown have expired. ### Observed/Actual behavior - A few Wardens remains active. Memories are lost too (which seems to prevent further despawn/sniffing/… actions). - If you logout, wait a few seconds (+/- 5 secs) then log back in, this will instantly trigger the digging animation and the remaining Wardens will despawn. ### Steps/models to reproduce - Spawn 90+ wardens and let them get inside a “one block” area. If used a block to attrack them, disable/remove it and wait for the despawn time (see screenshots for the setup). - Some will still remain (tested in Vanilla Server 26.2 + Paper 26.2 build 119 (without any Datapack, plugins, fresh server)). <img width="2560" height="1369" alt="Image" src="https://github.com/user-attachments/assets/6d3678da-45af-497e-8b82-bca660b7707a" /> <img width="2560" height="1369" alt="Image" src="https://github.com/user-attachments/assets/bda5aaab-3d38-49b9-a19e-b70c5ab1ec5d" /> <img width="2560" height="1369" alt="Image" src="https://github.com/user-attachments/assets/aafe66a8-ce34-4293-bf3b-30121ea93bc1" /> ### Plugin and Datapack List None, fresh server, default config. ### Paper version This server is running Paper version 26.2-119-main@bb09b43 (2026-08-25T13:58:23Z) (Implementing API version 26.2.build.119-stable) ### Other Mojira link : https://report.bugs.mojang.com/servicedesk/customer/portal/2/MC-311489 - Wardens (both spawned naturally or with egg) may fail to burrow itself when not triggered (no anger). Looking at his entity NBT data, the whole “memories” part is emptied. - This “brain washing” seems quite random. On 90 spawns, I got from 1 to 30 to lost their brain memories and not digging down. - This also seems to occur when doing a contraption where all the Wardens are pushed into a one block space (scaffolding, screenshots provided). Spawning 90 wardens on a flat surface seems to be fine (unless two wardens or more are colliding inside themselves, in which case, they never despawn) - I didn’t saw that issue (same setup) in earlier 1.21.x releases.