The frustrating thing is that basically everyone who self hosts Nextcloud will know exactly what you're talking about, and the solution is generally quite simple, and yet the docs for this problem are terrible, scattered, out of date, and mostly just link to old GitHub issues that don't directly address the problem until you get to some comment half way down.
It's a terrible user experience - seriously, point an LLM at it for a few hours to write the first draft of a "So you're stuck in maintenance mode" page, get it reviewed by the community, publish. Immediate quality of life improvement for everyone struggling to get started self hosting it.