[Update:: Confirmed on OpenSUSE Leap (KDE, MATE, and IceWM), Kubuntu, and Ubuntu on different computers and multiple versions of Doomsday Engine]
Just wanted to see if anyone can quickly test this for me so I can start isolating the potential cause. Holding "Shift" and using "Alt" (no matter if it's bound to fire or strafe) doesn't seems to work. This isn't a problem with any other key bindings (using left mouse and "Ctrl" while holding "Shift" works fine) so I'm trying to narrow it down to my current build. Anyone else have this problem or is it just me?
OS: OpenSUSE Leap 42.3
Doomsday Engine Frontent: 1.6
Keyboard: Razor Black Widow (tenkeyless)
All add-ons disabled