This is a workaround that I have been trying for a little while. Try constructing the message then switching airplane mode on then off before sending. I read something similar on another post and it seems to work for me so far.

@Jules We are aware of this and we are having a good look at it.

@Jules OTA13 is out and with it a newer QtWebEngine for Morph browser. So Morph has now a more recent version of chromium and with it better support of various websites. Can you mark the thread as solved. Or if you can't you can ask and I'll do it for you.