PLO50 AQJ4ss facing really weird turn donk

to me from a recreational this looks like draw + pair OTF went draw+2pair. spr4 top2 wouldnt mind GII.

if you are ahead, 3rd suit will break down the action plus you cant call another bet.

if you are behind 3rd suit will safe you one street while blanks you still pay him off.

you block many made hands, unblock many draws, betting pattern smells like what I mentioned and if he played a set that goofy just note and continue fishing

definitely an odd line. could bet a set or two pair that wanted to see a safe turn i guess. A3 would make sense also. depending on how wide he raises pre he might have picked up a wheel wrap, or even hit 333.

pretty gross to stack off with our hand in srp w/ 150 bbs

I'll take the pot control line here.. Call turn and reevaluate in river is better than stacking off here without redraw. In any safe river I will call (no heart, no straight card).

I did an analysis when I faced turndonks several years back. When a fish potdonks turn he just has it was the clear result. My sample wasn't crazy high (60 showdowns or so) but I remember more than 80% they just turned it.
When they donked turn only half pot it was super rarely the nuts. So, I am folding against population happily here

@tranceactor he has it means set in this case?

yes