One bug that hasn’t been fixed in 26.1.
I can reliably get iOS Safari to crash this way: bring up a fresh browser tab, scroll to the iCloud tabs Reading list section, tap and hold an entry and select delete from its menu. Safari will then crash. When you restart it, you’ll see that the item was indeed deleted right before the browser nuked itself.
Here’s hoping for 26.2. Well…, and that iCloud tabs reliably starts working again as a whole. It’s been in a semi-broken state for about 3 years now.