How to fix latest text bomb on iPhone 8?

Question

I sent the text bomb (Italian flag with a non-english characters on either side) to my girlfriend while she was on iOS 13.3. phone hung as expected. Was able to get control after a reboot and deleted the entire chat on messages that contained said text and things seemed fine but the phone still hangs occasionally. Upgraded to iOS 13.4.1 and the issue is still there. I've tried hard reboots but that didn't help.

Is there anything else I can try except for a full reset?

I can post the actual text here but I don't want to affect anybody using an Apple OS.

Answer 1

There were no preceding backups, but taking a full backup, hard reset and restoring it seems to have worked well enough.