Honestly I was always a bit surprised Brian never got a second trigger from the Bakuda bomb, since that setup seemed pretty similar to what Bonesaw did to him in canon.
People can't just 2nd trigger whenever a 2nd trigger basically occurs when a shard has gathered enough data to bud but then instead chooses to reinvest the bud's resources into the cape before sending it off. Note that his canon one only occurred during the nine after he'd gone through quite a few big cape fights and the levi one too. Additionally, Bakuda's thing was probably too far from his trigger due to lacking the key part of someone very important to him being hurt and helpless right in front of his eyes.