Mate 18.04 - Alt+Tab works only forward

Hello eveybody,
I noticed that I can’t make ALT+MAIUSC+TAB work. When I switch process using ALT+TAB I can only go forward and can’t go backwards. I looked in the “Keyboard Shortcuts” section of system settings but couldn’t find anything. Do you happen to know how I could fix this?

Thank you
Marco

I tried this way, does not work.

I noticed that it partially works: it works with the right Shift but not with the left one.

I just tried it in a 18.04 live session, and it is working for me, with both left and right shift keys.

It’s working for me as well.

On this end I followed clean installs on 3 systems with “sudo apt full-upgrade”. That took a bit to complete. Then I set up the environment to taste and installed all regular use software. I haven’t found anything at this point that isn’t working correctly. I installed on mine and wife’s daily drivers as well as one of my back up laptops. The only thing I’m waiting on now are a couple of PPAs to get working Bionic repos up and running.