Hi - I get this as well sometimes. Do you use the comfort cream when you put them in, as I find this helps a lot, along with pulling the top of your ear up and out as you put them in.
How long have you had them, I have to change mine every few years due to changing ear shape.
I once had to have a pair remade as they weren’t quite fitting correctly. ACS have great customer services and adjusted them for me, and they were much better.