I had a weird issue today when my hunter learnt traplauncher. On my lvl85 it works as expected, but on my wee little 48 it wasn't
actually launching the trap.. The logfile mentioned traplauncher, and "using explosive trap ...", and repeats those 2 lines, but doesnt actually
launch the trap.
I figured it out in the end, if those traps aren't on your actionbar somewhere, it is not able to launch the trap and will try forever..
Don't know if this is considered a bug or not, but thought I would mention it anyway.
I didn't attach a log, you can recreate it easily, just remove the traps from your actionbar.