One arm more accurate than the other?

I've been on the Freestyle Libre 1 for a few years, now switching to the 2. Over the past year of the 1s and now with the 2, I've noticed a weird trend. Sensors in my left arm are fine. Sensors in my right arm read way too low. Since I try to switch arms every time, this generally means I have one sensor last two weeks, then the next one lasts a day or two, then the next sensor lasts two weeks, repeat forever.

Has anyone else had a similar issue?

I'm not inserting the sensors any differently, and I use a mirror to make sure I'm putting it in the same relative spot on both arms. I sleep on my back, so I don't think these are just compression lows.