Well, no. There's a place for design and fashion pieces and a place for lightweight / inexpensive pieces. But the middle of the road options, your everyday average furniture? Those should be sturdy, reliable, simple pieces. I can see a stool having a 140kg weight limit when looking at it from the perspective of "a stool is for one person sitting on it".
But I'd rather it have a bit more strength. Things happen, like somebody wanting to sit in your lap for a moment or children being silly. Design for when things go wrong, not for a happy path use case.
We used the same config everywhere, still got randomness. Can't explain why. Good luck!
Are you using Trend Antivirus? We just finished a months long fight of very similar symptoms, and it was that our antivirus was deleting the login tokens.