It would be pretty weird, imo, if GTO play
didn't include raises for thin value that become folds when they get re-raised. It can happen on every street, including pre-flop. (e.g. you 3-bet with 77 or AJs and get 4-bet by a range you're in terrible shape against).
Snowie isn't a pure solver (so Pio et all might have very different strats for this spot), but this example didn't take long to build.
BTN triple barrels for 1/2 pot. BB check-minraises trips on the river (at low frequency) for thin value (to get called by worse Jx and Kx), but when BTN jams, BB should fold.