After resizing many images with gwenview and changing directory to resize more, plugins become disabled and cannot be used. This one is easy to reproduce and happens consistently every time.

To produce the bug:
1- Open gwenview, any method will do.
2- Resize one or more images within gwenview using plugins->batch processing-> resize images
3- Go one directory up, enter to a directory (any will do)
4- You cannot use plugins anymore.

To remedy the issue, you can restart gwenview. Which is not convenient when you have 20 directories to resize.