When using the key combination [NO] + [TRIG] key during LIVE RECORDING to clear the trigs from a sequencer track, it erases the preexisting trigs, but adds a single new one for the start of the erasure. You can’t effectively erase all trigs of the live recording. The act of erasing adds a single trig, and if you repeat the key combination to erase the first one, another trig will be added. Holding the key combination throughout a few repeats of the track/pattern will not erase the single added trigger either. The only way to erase it is to press the key combination again, which then repeats the problem.
Is this expected? I would think that pressing the key combination would not add a trigger (assuming you are holding No prior to pressing the trig), and that if it did, holding the key combination would erase the added trigger on the next cycle, resulting in the desired no trigs.