Front grind in 4×4 sometimes, any idea?

I’ve searched for this but couldn’t find what I was experiencing.

On my last ride while going through a gravel pit I climbed a steep hill in 4×4 low with loose dirt/gravel and at the top I needed to turn hard left which after a grinding noise started coming from the front. I immediately stopped, switched to 2wd and back into 4wd and it went away. It did this twice.

Any explanation for this? Cause for concern? Normal Can-am weirdness?

Thank you muchly in advance for any info.

2016 Outty MAX XT, 850 with 1600kms (60hrs)