I haven’t found pattern yet, but this has been occassionally happening since 4.4.0. Somehow after bringing editor back into foreground, level editor stops responding to navigation. That is, if I right-click to fly around, it won’t fly. Same with any of other mouse navigation stuff. Clicking on objects to select them still works, though.
only hint I have at moment is, it happens after application has gone to background and/or been hidden, and probably for some length of time, but it’s not yet 100% reproducible. Not so helpful, I know…
Ok, it actually has to do with a second UE editor window behind main level editor window. (Materials editor, mesh editor, etc)
mouse clicks are essentially clicking through first window into one behind it. I can confirm this by clicking and dragging in level editor, switching to mesh editor and seeing that model was rotated, etc.
And mouse eating behavior is not strictly limited to viewport, but entire window.
Hmm. It sounds similar but not exactly same. I can cycle between windows without a problem, which is unlike what describes, and I definitely don’t end up triggering it in same way. It could be caused by same underlying problem though.
I have not been able to reproduce this at all. I will keep this issue on my radar, so please reply to this post if you’re able to find some reliable reproduction steps. Thanks!