I usually input in lower case. It saves a lot of keystrokes when you've got dodgy hands.
I've raised this issue at Ancestry have spoken to a real person, after giving the chatbot a run around (name of Leif. how nice

). Eventually the chatbot just said "I can't help" and gave me a freephone number to ring. When I rang it I had 2 options - subscription queries or DNA queries. I've had this kind of thing before - no option for what you're after so they expect you to give up. I went through to subscriptions and got a man who was obviously a technical guy as he asked me what the issue was. I explained the issue, including the fact that I'd done the all troubleshooting they'd suggested except changed my browser. He accessed my account and found no issues at his end. He asked if I'd tried on another device, (smart phone or laptop). I've tried both and everything works OK (Laptop is Windows 11) but I can't use that all the time and I will not change browser to the one they recommend (Chrome). I hate being coerced into going to Google for everything. I'll have to wait till I can use my son's laptop to see if the edit search facility works OK on that. After that I'll get back to Ancestry (I have a case number).
If everyone has tried the troubleshooting suggested by Ancestry and still have the issue I suggest you contact Ancestry as well. The more instances they get the more likely they'll be to take notice of us.
Linna