I'm having this bug consistently for the past couple days.

The trigger for the bug seems to happen during combat, when receiving an attack.
After the trigger occurs, the game will enter a different state, where keyboard or mouse input will be followed up by a random sequence of inputs, either movement, firing missile weapons, and the repeated attempt to use the Flurry skill (no matter if it is mapped to a hotkey slot or not), prompting me to choose the direction, and even if I cancel it with Escape, it tries again and again to use flurry. Sometimes the random input will be several turns of the Wait command (but not through Rest), which, if there are enemies nearby, lead me to die, or if there are not, makes it look like that the game is unresponsive, except for the clock slowly moving. During these "wait input sequences", no input from me is accepted, not even Escape, nor mouse input.
Even weirder, if the game is at this state and I'm able to use the Rest command, the "resting turn counter" will pass really slowly, almost by 1 turn every 2 seconds.

If I'm able to get to the Options screen, saving and quiting, then resuming will revert the game back to it's regular state, however, if I'm in combat it may quickly go into the buggy state right after.

I did not manage to recreate the bug in settlements, and it started in the middle of a roleplay true kin run, when nearing the lair of Mamon Soul drinker. (I even thought initially that I might be suffering from some kind of domination or mental control).

Haven't tested this on other save files.