I’m assuming the threat meter values are from your client. Is that right?
If so, then it’s likely that what your client sees is different from what your friend’s client sees.
Ask your friend to run a threat meter in the same fight, and compare results. I suspect his threat meter will show more threat.
I imagine that if your client doesn’t get the info on the spell correctly, then it also won’t factor it correctly into the threat calculations used in your threat meter.
Not having checked at all, I would guess that threat meters gather combat log data for attacks, and then calculate the threat based on built-in spell details. Which may not include the talented stuff, because that doesn’t seem to get communicated between clients.
The best way to get a developer to look into a bug is to do as much research as you can on your own, and then provide that clearly. If you want something fixed, that is.
My guess is that this is a display bug (tooltip being incorrect), combined with a combat log limitation on applying talented RF multipliers.