Disable auto logout?

I have been experiencing a serious bug in WordPress for weeks and have not found any solution. To be clear, this happens with NO plugins, default theme, and after repairing the database (even though there were no errors).

I’m trying to figure it out and noticed SOME (although not complete) correlation to when WordPress auto logs out when I’m away from the computer. So I thought I’d try disabling that. I can’t find where to do that AND, when I search for answers, the only threads I can find are those that say there is no way to ENABLE auto logout. ???

So my WordPress app logs out by itself — but this isn’t supposed to be a feature?