Yep, my bad. I had never before heard hitbox "clipping" used at any meaning more than "hitbox overlapped with hurtbox, therefore counting as a hit". It doesn't strictly mean an 'unintuitive" or "unfair" hit taken, just... a hit. When complained of, that's usually from an AoE bearing player or unit moving across another player's hitbox, but at that point the specific term carries no specific use or value; you may as well just say "hit".
I'd had the thread opened for a while before responding and forgot to scroll back up first. My apologies.
Tangent:
That said, for a near-zero ping 2.5s GCD player to be unable to triple weave would mean that the average ICD of the skills used across that global is above 6.2 seconds. Non-movement animations with such high ICDs have been increasingly pruned from the game, pushed towards a more standard 0.5s (+ rtp), so it seems unlikely that a 2.5s player would necessarily need a 3rd party tool to do so. When playing on JP servers, JP friends regularly reported that they could triple-weave (and not merely mudras, which briefly had an especially low ICD) without drifting their GCD whatsoever.