What a negative post without any proof. This issue might’ve even been old and not related to a recent update. The post you’re quoting actually has a comment showing that this might be a bug already reported in 2023 https://github.com/nextcloud/android/issues/12137. In that sense a future update might just fix this problem. Also take a look at the changelogs of Nextcloud. They don’t just contain new features, but also many fixes and improvements/rewrites of old code to make things more stable, more maintainable and faster.

If you’ve been updating to new major Nextcloud versions right after release: stop doing that. Wait several point releases and updating becomes really stable.

The trick is to wait several point releases before updating. This makes it much more stable.

In Nextcloud you can use Deck or Collections for shared notes.