If your stack is smaller than a pot-sized bet, you shove all-in for less. That's normal. Pot-limit doesn't forbid short all-ins.
Short in a PLO MTT: prefer nutted made hands and strong draws that can win flips. Speculative medium rundowns lose their implied-odds story.
'Short stacks still pot-limit' (PLO tournaments, G0): Short-stack shove/fold is a chart + cover problem, not a flop fantasy.