This is not exactly a bug.
I noticed that Weasis downloads the images to the windows temp folder, once Weasis is closed it cleans after itself and the folder is emptied.
Our problems arises from the fact that we re use the same instance opening new studies with the close argument
<argument>$dicom:close -a</argument>
Even if you close the study manually from within Weasis, the temporal files remain until Weasis is closed.
This causes the temp folder to grow continuously during the day.
Since re using the same instance during a session is probably a very common use case, it would be nice to have a way to empty the cache on each new study.
Cheers!