Rubber bands snap and take your cash with them, at least a clip stays in your pocket.

Sounds like the blue stuff got the best of you, but one bad night in the garage does not mean threadlocker is the enemy. Plenty of folks run clean threads and a torque wrench with zero issues, so maybe your real problem was the amount, not the product. Curious though, do you skip the lock on caliper bolts only or stem bolts too?

Did you ever check if it was the heat or just the wait? Buddy of mine ran a small lathe shop in Amarillo and swore the same thing, but turned out he was just letting the burr work harden a bit before he touched it. He cut his sanding time in half and the edges came out cleaner too. Could be a mix of both for you.