V17.2.1 Linear Gamma

v17.2.1 , While it has resolved the HDR palette bug (hurray).... all my nodes that I have set the 'Gamma' to LINEAR (cause that's how I set Exposure) ... have all changed to a highly contrast ugly look since the upgrade from 17.2 to 17.2.1.....which means I have to do all those grades again.
I even have saved stills which were perfect & now when I apply them, same bad result I get from the Nodes that are set to ‘Linear Gamma’
Weird. This is a bug.
Have Black Magic changed their Linear Gamma Algorithm overnight? Bit of an issue

NVIDIA GeForce RTX 2070 SUPER
Operating System: Windows 10 Pro 64-bit (10.0, Build 19041)
Gigabyte Technology Co., Ltd.
System Model: X299X AORUS MASTER
Processor: Intel(R) Core(TM) i9-10920X CPU @ 3.50GHz (24 CPUs),
Memory: 132GB RAM

[Peter Chamberlain]

Please don’t dupe post for the same issue.
I’ve deleted all the dupes this time.

Ok, i’m new on here. Cheers

Just an update. I also realised that When using curves previously, turning the node Gamma On LINEAR or Off back to ‘timeline’ default had no effect.
But now in V17.2.1 change the node’s GAMMA to linear that has a curve adjustment completely effects it. This proves there is a BUG with Linear Gamma or they have changed LINEAR mathematically. I dunno. But it’s caused me great anguish. Oh well.