We have a winner! Settings>General>Reset>Reset Network Settings
Thanks to @leoerlandsson for the solution (though I have no idea why it worked) and to all others for very plausible, clever suggestions (and RTs). @hesthamar @austingovella @frasen @collini @opassande @Beastankar x.com/axbom/status/9…
FFS. Just when I thought I was in the clear... 😩😭
The common denominator seems to be that I’m connected to a WiFi network. It doesn’t seem to matter which one.