Ctrl+Alt+S shortcut for Export not working on Linux version

[dandv]

Nothing happens when I press Ctrl+Alt+S with the cursor over an image in the Browser, or while viewing an image.

I wouldn't complain if Alt+T then "E" worked, but I see that submenu items don't have accelerators at all (!).

XnView MP Linux, Version 0.90 64bits (Mar 5 2018)

[xnview]

it works on ubuntu, else you can change it in settings>Interface>shortcuts