I'm on Windows 10 on a laptop with a beefy graphics card. I never have problems using Game Bar to record videos of my prototype animations. I never have any problems while recording videos from other applications but when recording from XD's preview mode there are loads of dropped frames, to the point where whole parts of the animations are simply not there and the motion jumps with no fluidity from one state to the other.
Viewing the animations in preview mode without recording plays the animations properly.
Hey there, do you mean that while recording, the preview window itself lags, or is the lag appearing just on the video, while everything is smooth within the preview window itself? I'll test it out myself later, when I get the chance.