A couple of times a year it will just nuke all my open tabs (450-500) and present me with a delightful blank screen. Before that it will mislabel the active tab group on and off before giving up entirely.
Quick action on my part stops the destruction syncing & I usually end up recovering them on my Mac & then save them as a tab group.
But literally just an hour ago, iOS Safari looked like it nuked ALL MY TAB GROUPS. Ugh. They were gone; swiping right led to the "New tab group" screen. Frantic backing up and a restart later, and the tab groups are back, as though the phone was like "just kidding!". FML. So much for that backup plan.
UI bugs are one thing, but how is that level of data loss acceptable in a modern operating system? Boggles the mind.
(And don't get me started on the UI track wreck that is the iOS-inspired/inflicted bookmark management on macOS Safari, where all Mac UI conventions went out the window for some reason.)