I know our kernel is too different than mainline, but I don't think they will silently ignore the patches. We might get some review comments on it that might either acknowledge the problem, or point to some other place where problem can exist. The "drivers/rtc: rtc-sun6i: AutoCal Internal OSC Clock" patch series is a nice example where the mail was not simply ignored. Granted its not merged, still I think the knowledge gathered from external review would be valuable.
Also main reason for asking was that It might also become beneficial for someone else who might not be using Armbian but still might be having similar problem from time to time.
PS: its just an advice. And up to the contributor to take it or leave it. I am not using Armbian on any of my SBCs anyways.