I've checked in 7.8.5.0 and could not reproduce it.
Does it happen on certain website or any?
Is Follow the coursor used with this?
I don't remember the first website it happened, but I'm sure it not on certain, because im seeing this bug again today, and this is another website. It does not happen every time, so im not sure how to reproduce it also.
Nop follow cursor is disabled.
I just do right click and to action designer. That's my entire process. And sometimes is activates my needed element and in a half second hop to previous element, i have worked on.