Ctrl+D in Spectralayers full screen not working

Im finding it really frustrating using SL. not least because it crashes CB and my PC a lot, but also because the above De Select key command doesn’t work as it should in full screen.
When i have SL in the bottom half of the project window it works fine, but when i enlarge the window up i have to do it twice to de select anything.
Its been happening for a while, not related to the latest update.
Windows 10, Pro 11 all up to date.