Perhaps the bedroom circuit breaker is one of the "special extra sensitive" circuit breakers that we have experienced...
Unfortunately when we completely rewired our (circa 1939) cabin we ended up with several circuit breakers which had been manufactured just after a new regulation was put into effect.
The bedrooms due to a new regulation required a new type of breaker which was different from the kitchen/bathroom gfci's. These "new bedroom circuit breakers" are supposed to trip much more easily -- in order to protect silly little children who may put things into outlets.
We found that the ones which had been manufactured during the first few months were especially weird... Supposedly "nothing wrong with them", but replacing them the fixed problem. Note: electrical work was being done while we were doing other remodel work (when walls were open). We were there, so we know which electrical items were replaced when.
Since we were re-wiring everything, meter box, adding breaker box (instead of screw-in fuse box), all work fell under new regulations. i.e., we had to meet "current code". Since you mentioned Bedroom, it set off a little light in my head.... The bedroom breakers are supposed to be more sensitive! We have also found that they are the more prone to behaving strangely. We found that the breakers which were from the earliest ones manufactured under those new regulations are extremely "twitchy"(prone to tripping).
An electrician who has worked in your area of the country for a while would probably be able to replace a breaker cheaper than trying to "figure out what is wrong with it." As our weird "overly-sensitive" "bedroom breakers" were technically working "within spec's", nothing was technically nothing "wrong" with them from an "electrical code" point of view. Replacing the "old design bedroom breaker" (2005) with a "new design bedroom breaker" (2008) helped with the worst one of the bedroom breakers which were tripping too easily.
These "overly-sensitive breakers" were even more frustrating for us, as we had opted to move our electrical panel outside. When the one remaining "old breaker" flips during a thunderstorm, we have to wait for rain to cease, and go outside to open panel to reset breaker. Yet another reason we have UPS's -- so we can gracefully shutdown computers until rain stops.
Because of those "ultra-sensitive" breakers, we try to never have anything plugged directly into the outlets on them. Even plugging and unplugging items would trigger them to flip! Since we have mostly electronics in the bedroom with the most sensitive breaker left, we kinda look at it as an extra protection. Our solution for tripping bedroom breakers when unplugging items was solved by using a battery-backup UPS.
For What It's Worth, here are just some of the things which we no longer experience with our "new bedroom breakers" which used to cause the "extra twitchy" bedroom breakers to trip:
- using remote control on air conditioner (on it's own circuit).
- unplugging a lamp while it was still on (we avoid anyway, but duh!).
- plugging/unplugging vacuum cleaner (good excuse to get cordless vac).
- lightning storm which cause power fluctuations.
- electrical surges/drops which cause our other UPS's to beep.
- turning off switch on conventional "power strip" plugged directly into outlet.