I had this issue on iOS, worked fine on desktop, but the app crashed, I think it was a specific notification causing the issue and it semi went away when I got enough notifications to push the offending notification off of the top of the list, and only when I scrolled down and the list had to reload did it crash again.
It happened when I was on pxlmo.com, I switched to metapixl.com after having more issues with pxlmo.com.