Is anyone else having issues with new version of Firefox when using forums?

I kept having issues with using the forums on Firefox. I don't know if it's related to Firefox or the forums. The problem is if the mouse cursor leaves the text field, the text field automatically looses focus. If I bring the cursor back in the text field I have to re-select things again if I want to copy and paste or format a post. I have to make sure the cursor doesn't leave the text field when creating a post or editing one.

 

just updated and I have the same problem. Does anybody knows what is related to? Current version is 50.1.0

 

It looks like the issue is now resolved. The problem is no longer happening. There were no updates to Firefox, so something must have changed on the forum side.