I feel like I must have made a mistake in the setup but I can't see what it is.

I'm looking at a hand that was posted in the HSNL thread on two plus two, hand is here if anyone is curious https://forumserver.twoplustwo.com/showpost.php?p=55136759&postcount=187

So basically CO opens, BB defends, flop is T32 two tone, and BB c/r vs a 1/3 pot cbet.

BTN calls.

Turn is a 4, so obviously a good card for the BB. But in my SIM PIO is barreling almost 100% of the time, which makes me think I've done something wrong, but I can't see what.

Are there situations where we check/raise flop and barrel almost 100% of our range on certain turns? Its not something I've seen before.