Nextcloud Office tab crashes / long loading time on Hub 26 Winter (Docker, Proxmox)

[WomM]

Maybe I have a similar issue, but I am not sure:

Slow Document loading due to EXDEV: Invalid cross-device link

Dear community! I run nextcloud via php / apache and collabora via docker container. I have been trying to research, configure and test for two days now. The fact that I cant find similar problems during my research lead me to finally ask here. Thanks in advance for helping me out. Everything seems to be working fine - but document loading is very slow (up to 60 sec). When I open an existing document or create a new one, the following ERR appears in my logs: wsd-00001-00200 2026-03-18 07:18:…