Multi special key pressing not working. Shorcuts not working

Hi there! It’s been a while now since my shortcuts aren’t working. This happens system-wide, in every application. For example CTRL+ALT+T for opening the terminal doesn’t work, it just does CTRL+T (not ALT). Watching the events on showkey it seems as every key press is detected but for example, for the shortcut mentioned before, the ALT key press is detected and then is ‘‘automatically’’ released when CTRL is pressed, so only CTRL+T is detected. Strange behavior.

I tried adding a new user to the system and using it but same problem.

When I connect an USB keyboard I can do all the shortcuts without problem on every app! CTRL+SHIFT, CTRL+ALT, etc. are all detected properly.

Any guidance is appreciated! Thx in advance!

Edit: some more debugging info:

➜  ~ setxkbmap -query
rules:      evdev
model:      pc105
layout:     us
variant:    altgr-intl
options:    grp:win_space_toggle
➜  ~ xmodmap
xmodmap:  up to 4 keys per modifier, (keycodes in parentheses):

shift       Shift_L (0x32),  Shift_R (0x3e)
lock        Caps_Lock (0x42)
control     Control_L (0x25),  Control_R (0x69)
mod1        Alt_L (0x40),  Alt_L (0xcc),  Meta_L (0xcd)
mod2        Num_Lock (0x4d)
mod3        ISO_Level5_Shift (0xcb)
mod4        Super_L (0x85),  Super_R (0x86),  Super_L (0xce),  Hyper_L (0xcf)
mod5        ISO_Level3_Shift (0x5c)

edit 2: the problem seems to be with left CTRL, with right CTRL everything is OK for multi-key shortcuts!

edit 3: sometimes when I spam the shortcuts they start working for some time! and after a while they “break” again… VERY strange