My Xbox game clips are lagging

That sounds like a different issue all together.

What system are you using and where are you recording your clips to?

turn on 4k and set the resolution to 4k, then your monitor get the 1440p picture (downscale the 4k image) and your captures are fine again.
this is how i fix this myself on series x

I was somehow able to fix the lag by setting my refresh rate to 120hz (vs 60) and keeping my display resolution at 1440p and the capture resolution at 1080p. Not sure how but my clips have been perfect since!!

Yeah my monitor is a 1440p 144hz LG. It seems like everyone in this thread is having issues with 1440p monitors. I fixed the problem by switching my resolution to 1080p whenever I want to record footage.

I'm having the same issue on my Xbox series X. I have a 1440p 75hz monitor and my output is 1440p, even with the output and monitor set to 1080p I still have the issue. I have tested this with and without freesynch (On my monitor) turned on, as well as variable frame rate setting on the series X.

The strange thing is when I was playing the Halo Infinite flight recently, nearly all of my clips had NO lag spikes or stutters, there was 1 clip that had an issue (I had made at least 15 captures).

I also say I would rather play my games smooth at 1440p and FPS as high as possible, rather than lowering the settings just to have smooth captures... But it would be nice if this issue could be resolved.

Any thoughts?

Looks like right now the only way is to set it to 1080p and have smooth captures, or to play 1440p and have stutter. Sucks, but that's the way it is until they fix it.