moturola g4 play. android. firefox
when making a new pm: onboard display pops up and the sendbutton is hide.
there need to be more place under the send button. or. the possibility to “overscroll”
i today updatedt to android 7.1.2, lineageos 14.1 > still the same…
well, that is most likely a problem with the forum software, which we did not write - it also gave us the headaches about the vanished old gallery pictures… The problem you describe might be possibly fixed (no guarantee!), when the forum software is updated to a new version at some point in time - there are plans to do this, also you can accelerate the process by sending hosting donations to TK., e.g. via PayPal, any amount will help, thanks! 
Many greets, Peter