Don't fly it much, but last night had it compress on me in a way I don't remember it being prone to before. I augered as I was busy trying to work out what the flump was going on. This was obviously in a dive, but with power all the way back.
Next flight out, deliberately tested in a dive and sure enough it compressed again, requiring lots of elevator trim to recover.
Maybe its always done that, but I don't recall it being a problem before. Felt more like a 109 TBH.