@earls
Sorry for the delay in replying! I've looked into this a bit, and these sorts of issues (missing text boxes/unable to reply, odd reaction behavior) definitely exist, but generally seem to be something weird about the particular device rather than something that can be fixed on the forum owner side. Solutions people have found have varied from:
- Refreshing a lot (unlikely to help if you're seeing this persistently)
- Restarting the device
- Switching to the default Xenforo forum style
- Updating to the latest version of the OS/web browser (there are definitely some Android updates that have broken various elements of the text box in the past, so if you happen to be on one of them this could explain what you're experiencing)
- Disabling any adblockers (these can cause surprising behavior, because they at times manage to block things other than ads!)
- Clearing the browser cache and performing a forced refresh
Sorry that there are no real silver bullets here... there are any number of weird device/browser warts that could be causing problems. If you make it through this list and the problems persist, then I could maybe look into more specific solutions with additional detailed information about the device and browser (exact OS/browser versions), but probably there won't be a lot I can do on my end, unfortunately.