This is a well known problem with older Ray Allen relays. Very common years ago. I think they must have changed the design, becasue I haven’t heard of any recent failures in newer installations.
Paul F. Dye
Editor at Large - KITPLANES Magazine
RV-8 - N188PD
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)