21.10 - Reading a compressed .mkv using mpv makes caja keybinding go half-numb

This is another one of my infamously weird problem that I have tested on 2x 21.10-latest systems: 1x laptop using a bluetooth keyboard and 1x tower using a regular usb keyboard. Both same problem.

Using 21.10-latest (which includes caja v1.26.0):
1. Pressing META+E opens up my home folder;
2. Clicking on the first entry on the right panel and then pressing on the "v" key selects "Videos" and pressing "enter" lists the "Videos" content (As it should);
3. Using the keyboard down arrow and pressing "enter" over a .mkv files open it up with mpv and it plays file.
4. ALT+F4 closes it, cursor is back in caja, using all keyboard keys work fine, I can use my arrows, my letters are registering and I can keep on living the mouseless life in a TTY7 environment.

BUT if instead of opening up a .mkv I open up a .rar file containing a compressed/splitted mkv THEN after pressing ALT+F4 to close mpv the cursor selection is indeed back in caja(as it should) but the keyboard arrows and letters do not work anymore. Yet the "delete" and "backspace" keys are still working in caja.

Hmmmmmmmm