Broken XP Rim

I just had a rock break the inside of my right rear rim… again ! :bowl2:
This is the 2nd time I’ve had a rock get caught up on the inside of my rim and punch a hole through it. Looks like the rock gets pinched between the caliper and rim and the rim looses.
The first time it happened last year I was going through a small water/mud hole and a small rock (about 3") got pinched between the caliper and rim and actually locked the wheel up as it punched a hole in the rim.
On Saturday I was riding down a gravel part of a trail (large gravel – 3′ – 4" rocks) and again a rock got caught up in the wheel and tore through the inside of the rim…. again the right rear.
The 1st time I thought it was just a fluke… now that it’s happened again I’m thinking it may be associated to my rear A-arm guards. The guards protect the a-arms and CV boot very well but I think they affect the clearance inside the rim…. any thoughts?
Anyone else have this happen to them? if so do you have rear a-arm guards?
This is getting very expensive so I’m thinking of just removing the rear a-arm guards and taking my chances there.