unraid 6.12.8: When dashboard tab is open "long enough" this problem occurs. Log getting full and nginx crashing. For example "users" tab can be open as long as needed without problems. My diagnostics won't show more than others here - otherwise this bug should be fixed long time ago. I hope this is getting to the to-do list.
Unraid 6.12.3: No problems. I won't downgrade due many new features and bugfixes done between .3 and .8.