Lately, the Web UI terminal on this addon has been impossible to use on iOS. Apparently it works, but the foreground colour of the font seems to be transparent, so you can only see the outline of the cursor and everything else is invisible.
Unfortunately I don’t have a good idea when this problem started, but maybe 1-2 months ago. I’m running iOS 15 and everything on the HA side should be current stable versions. The same problem is both on the iOS app and Mobile Safari.
