Endless scanning

In a recent test for the last snapshot version an endless scanning occur, impossible to stop, after doing a rescan of all selected hosts. Even if I try to cancel it.

Are you referring to the builds from 24 December? Please provide more details about what you do and what happens, and attach some screenshots.

Yes, it is the December 24th snapshot version. The issue is that every so often I select all the previously discovered IPs to perform a full rescan. However, unlike other versions, with this latest version, if I press the Stop button (the "x"), it says it's in the process of stopping, but it doesn't finish, and the only way to close the program is with an "end task" command.

In that case please select any device still being scanned (any one with the question mark) and choose Properties to see which specific scan doesn't finish, and then post the details here. Again, screenshots would be very helpful.