Shrinking filter
Yes, that happened in my RV-7 and was starting in my 10 also. Found out from a previous thread that the filters shrink over time. Bought a new filter and I was amazed how much the old one had shrunk when compared to the new filter. I also epoxied some aluminum to the bottom of the housing.
Tempest is working on a filter that will fit our RV's and no oiling.