Here at Astrodon, we have noticed this issue. It seems to be an issue only with some of the new filter wheels? I pose that as a question because we never heard of this until recently, but who knows?. In any event, we will soon have new "low profile" filter cells (2-3 weeks). If you order a new filter specify if you need the new low profile cell and we will hold your order until the new cells are ready.
If you have existing Astrodon 1.25" filters that are banging your filter wheel, you can send them to us to be re-fitted with the new cell. But it is my understanding that this is only an issue for a small number of filter wheels.
I'll take this opportunity to tell everyone (again) that 31mm filters are the way to go if your filter wheel supports them. Same 27.5mm of naked filter glass, but mounted in a 31mm ring that is flush with the 3mm thick filter glass. So the filter is closer to your sensor, which is a good thing. 1.25" filter cells are 31mm in diameter, so everything is the same as far as that goes.
Lastly, we can convert 1.25" filter cells to 31mm, but not the other way since the filter is glued into the 31mm ring.
Before you ask "Will the new Astrodon low-profile 1.25" filter cell fit my (some other brand) filter?" The answer is "maybe but I don't know" because your filter glass may be of a slightly different diameter or thickness.