Power cycler is supposed to give you 1-2 extra charged strikes. However if you use a charged push attack and then try to immediately push attack again the second strike will cancel the weapon’s charge.
Any other combo of attacks like push attack-light-light, push attack-heavy-heavy etc all work normally and you get the full number of charged strikes.
EDIT: This bug can also happen if you try to chain into the push attack after doing a charged light or charged heavy.
I’ve noticed that the activation just fizzles, even before the push attack, likely due to inputs being issued too soon to the last. Previous game version you were able to use the special activation just before priming the push attack for a pretty smooth and quick powered jab, but now it’s up to chance on whether it’ll work.