Raspberry Pi 3 and Osmc

How can you be sure it’s a power issue if the power warning isn’t displayed?

I’m thinking there is some kind of problem with the March update.

I have 2 rpi:s running OSMC, and my brother has 1, all running the March update. All three systems started behaving odd, crashing, not connectable with yatse, plugins not starting etc. in the same day…

I’m thinking two could be a coincidence, but three?
I’m not surprised one of the systems would go bananas, I’ve messed with all kinds of system settings, installed scripts and what not. But the other two are almost untouched. A few plugins from the original kodi repo, that’s all.