If "ADSP" in Utilities is already checked when loading a vessel on the launch pad, the panels will not deploy when reaching 70km, not using ascent guidance. Unchecking and rechecking the option works fine, deploying the panels. Loading a vessel on the LP, and then checking a previously unchecked ADSP in utilities works fine.

Panels were inside a fairing that deployed at 70km. Ascent guidance does not have this bug, previously checked ADSP works as intended. /O/

MJ 2.7.0 in KSP 1.3.1

@GargamelKSP People have been making modifications on this, is the bug still present?

Yep I'll have to look at that one :/

I touched solar panel auto-deploy when adding antenna auto-deploy, you can see my PR for that here #978, so it's probably my fault.