Our trucks don't do that to the intake.
I love all the arm chair tech's acting like they would even know where to begin with this issue...LMAO
238* coolant will pull timing, and I'm sure MCT is plenty high by that point as well to be reducing timing (the ecu start reducing timing at 100* MCT, 200* coolant). Keep in mind, the tables that do this timing pull are meant to pull timing from the already optimistic borderline/mbt timing tables. So they're not pulling timing to reduce power per se, but more so for the ecu to get ahead of potential knock. Instead of allowing it to knock, then pulling timing, Ford determined how much timing to pull per temperature to keep things happier.
And it is also likely in COT or FOT (catalyst or flange over temp) protection, which reduces enriches AFR without going into PE/OP mode, and if temps keep climbing will reduce target load (close the throttle, less boost, etc). But we need to see data logs