One thought (but not an EE here) is to check each lead of the 2 encoders for electrical continuity to the metal case of the encoder. There should be no continuity on any of them when checked with a DMM.?
On my most recent build, my visual inspection of those leads looked good, but I failed that continuity test on a couple of the leads. I found that issue before powering up for the first time, so don't know if that could affect the 2 push buttons or not. Worth checking though since it's a common build gotcha.?
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73
de Roy - KI0ER
Littleton, Colorado USA