hm… this sounds oddly familiar.
@YisusL please have a look at this thread. Could it be that we face a similar issue?
My problem is that I don’t have access to a screen to check logs once the pi locked me out.
*Please keep in mind that I might face more than one issue (locking out and turning off randomly) and don’t get confused when reading my posts. I’m utterly confused myself haha…
otherwise, yes as @OliverV mentioned… the power source is a very common problem, there are numerous people experiencing these issues. See this >>> Posts