Can using a bad tube hurt an amplifier?

Sounds like voltage changes if they occur from a tube should be corrected by the auto bias?  

The problem I had was the tubes were fine for several months.  And then one day within 20 minutes one of the tubes started over heating and glowing alot more  it wasn’t the glowing tube that was the problem it was another tube in the same series, since they’re all connected.  all the tubes test fine it’s just that one of the tubes begin having voltage problems after 20 minutes. Very difficult to diagnose when you have many tubes.

There’s no way to predict this.  These were NOS tubes, presumably supposed to be higher quality than the new stuff.

Maybe all this supports getting monos.  So it's at least a 50% problem, although still bad.