I was curious if they would have issues like this. I experience this with my AirPods Pro occasionally. I usually always have them in transparency mode, but one will sometimes not automatically switch back to transparency when I put them back on from the case. Sometimes it switches back within a few seconds. Other times I have to put them back in the case and pull that one back out first. My original 1st gen AirPods had a similar issue except one just wouldn’t connect at all. Again, I would have to put them back in the case and pull that one out first. Sometimes it took a couple of tries.