Trackpad randomly non-responsive after lid having been closed

So lately I have been experiencing more and more often that the trackpad on my MacBook 14" M3 suddenly is non-resposive. It happened the first time on a flight a couple of weeks ago, then it happened two times yesterday, and again today. The only way to solve the problem, is to reset the SCM.

I just updated to 15.1 and hoped that would be the end of this problem, but no …

I would assume this is just a software issue, since the SCM reset fixes it, or can it be hardware?