Here's something new.

When I try to reply an e-mail, sometimes (very frequently, actually) the compose window locks up, I can't type anything, the bottom part is completely unresponsive and the original e-mail's content is missing.

I have to reload the page to be able to reply to an e-mail.

I'm experiencing it for a few days now.

This is very unconvenient, if you ask me...

macOS/Sierra and Safari

Would somebody take a look at it, please?

Thanks in advance,

Imre