I thought it was a thawing issue as well. Boots looked like they were about to explode all the time until one ripped open. I don’t have a shop yet so my sled sits outside loaded in truck all winter. I made sure to zip tie the rubber on the tie rod and the a-arm,,,,, that didn’t fix the problem. I then put gorilla tape over the 2 largest holes on each side above a-arms. That solved it!! I believe they are the 2 square holes.
In deep snow sidehilling they must let snow pass through.