It happens quite often that the cursor doesn't go or stay in the field I clicked into with the mouse.
For example the cursor is focused on a email body textarea and I click into the subject input field...and it simply won't go there.
Or I click into a certain text position of the input and it will simply add the new text to the end instead of where I clicked.
Thanks for the report @natarius. I experience these conditions when doing regular tasks around N1. It also affects plugins that manually focus on their elements.
I have the same issue. The only way I've found to get around it is to first click the recipient email address, then to click the subject line, which is very unintuitive. Do you know when it may be fixed?