Swapping between keyboard and controller or vice versa appears to create a momentary pause, seemed to be noticeable when SoS came out, but maybe it did that before then, though I dont recall it happening.
Ah, yeah it could have been the update just before SoS that introduced it; its annoying that’s for sure, hope it gets fixed!
Are you able to record video of it happening? I've not seen it. There are occasional pauses when the route is loading things, so if it happens while you're moving that is the most likely cause. That has been around forever though. Sometime earlier this year a new occasional pause feels like it crept in that I've never really been able to put my finger on properly to report it in a way it could be reproduced. Maybe you're talking about that?
Everyone else seems to think its better now. This thread is about the pause that was happening when you selected something with a controller and the game would revert to mouse freeze for a moment then switch to controller again.