After installing Debian Jessie with Gnome 3.14, I noticed an annoying bug: When I tried to switch windows using
Alt+Tab it worked as it should, but when I tried to switch in reverse order, using
Alt+shit+Tab it did not work. I quickly figured out that the problem lies in the frequently used shortcut,
Alt+Shift for switching keyboard layouts. Indeed, when I tried cycling through windows, I switched keyboard layouts instead.
The gist of the solution was found after some searching in Stack Exchange albeit it needs some adjustment for newer version of Gnome: Start the Gnome’s Tweak Tool and select Typing from the Tweaks menu. Under “Miscellaneous compatibility options” select “Shift cancels Caps Lock”.
This fixed the issue for me, without any side-effects. I don’t need to use
Shift-Alt instead of
Alt-Shift as suggested in the original solution and neither the Shift key cancels the Caps Lock as may be suggested by this option.
Update 2020-06-08: In Gnome 3.36 the relevant setting appears under Keyboard & Mouse -> Additional Layout Options -> Miscellaneous compatibility options.