TP'ing when the medium is too wet is the #1 reason the medium would fall apart.
I've been TP'ing dry since 77' . . . seems to actually hold the shit together. Then water thoroughly.
Assuming you've watered your tp, just keep it out of hot sun for a couple days. Don't re-water until your plants need it (EVER!)
You want your tp'ed roots looking for water after their initial adjustment.