Inconsistent Image Stretch behavior in 3.0.0.7

In 3.0.0.7 (I think this is unique but I cannot be certain) if I do not have autostretch enabled, it sometimes occurs that I cannot stretch the image on screen using the button on the window, or move the slider either in the histogram tab. If I tab back to the prior image in the sequence, it works, as it then does if I tab forward again to the image that previously refused to stretch. Here, I close a plate solve window and try and stretch the last image. It refuses. I load another image and it stretches ok. I close the problem image, re-load it and it can stretch.
Video showing behavior. Hope this helps

Dropbox - File Deleted

I think I have tied this behavior down further. It seems to occur when there is an image on the screen and there is a subsequent plate solve. If you close down the platesolve image, one cannot stretch the last image on screen.