Can’t change username

[RoseWindow]

If I have the username box logged in and ready to go (in classic and mobile versions) it doesn’t bring up the keyboard to write in anything new in the username box. Safari IPhone 8+. Anything else that I can try?

Morning, @RoseWindow. Sorry to hear you're having problems with that. We're wondering if it may be an issue with your device rather than the site but let's see what we can do.
We know it's a faff, but have you tried the usual things like logging in and out again, and restarting your phone?