That's PhotoshopCC with all the weird stuff it occasionally does :- )
But I am glad it worked, I noticed the behavior is pretty random, but what I think it does is [ It will try to "auto" adjust histogram, except it doesn't know linear is that much more wider than usual raw from camera so it can skew it bit too harschly, then when you switch to 2010, it will try to convert those previous settings and come up with something even weirder, forcing you to reset).
Anyway, I suggest updating to latest CC patch there is, seems like it added some features I didn't notice before.
Anyway x2: I stopped using fully linear to camera raw workflow, since I tonemap using Filmic in VFB+, I just follow with clamped 16bit file into CameraRaw. I still have enough range to work with as long as I had the exposure roughly correct.
This is slightly faster, more consistent workflow when you work across many images that need to look the same-ish. Doing bespoke tonemapping from linear in post is always bit different across range of different images.