I read this thread and this issue is not listed.
I experienced the same issue with most beta versions of Volumio 3 and reported it on the old beta thread. It’s still happening in v3.175.
The issue is that some functions stop working. If I go to the artist page, I should see all artists listed along with images but often (after a day of uptime) this page becomes blank. The thin green progress bar slowly moves to the right but the page never appears and the search function never returns a result. Same happens with the album page.