Mine is an old Sharp LCD TV, without HDMI control (Extended or Limited)
The problem occurs both in FSE mode and in Windowed mode, but in a different way:
in FSE, during playback, pressing pause/play several times, it locks the 16-235, then goes back to 0-255 until the next pause.
In Windowed mode, it does not lock in any way the 16-235, it remains fixed at 0-255, even by pressing pause/play
As repeated, I have always used these settings for years (madVR 16-235 GPU 0-255).
The problem arose now,
this is a bug between JRiver x64 and the latest madVR builds,
because with JRiver x32 there are no problems
But could someone with Win10 x64 and JRiver x64 give it a try?
Thanks
P.s.
I remember that by setting madVR in 16-235 and GPU in 0-255, the Limited range is sent to the display, as the GPU is bypassed,
And it is the best option for panels that do not support Full range, or for those who prefer the Limited range and use the PC only for Video material