My Vero 4K is doing this too (latest update). I only have had 2 examples of such content in my library:
Remuxes of the 4K/UHD BDs of:
Suspiria (1977) (like the poster above) but since deleted.
Hotel Artemis (2018) which I still have.
Both are 4K with 10-bit colour, but do not have HDR and are encoded with BT.709 colourspace.
Hotel Artemis has the exact same characteristics:
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.1@High
Codec ID : V_MPEGH/ISO/HEVC
Duration : 1 h 33 min
Bit rate : 68.3 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.344
Stream size : 44.8 GiB (90%)
Title : Hotel.Artemis.2018.2160p.BluRay.REMUX
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Mastering display color primaries : R: x=0.000000 y=0.000000, G: x=0.0000
00 y=0.000000, B: x=0.000000 y=0.000000, White point: x=0.000000 y=0.000000
Mastering display luminance : min: 0.0000 cd/m2, max: 0 cd/m2
My AVR (Denon X2300W) receives a 10 bit BT.2020 YCbCr signal which is passed to the TV, and when the TV’s colourspace setting is at Auto, the colours are certainly incorrect and too garish.
Luckily, I can manually choose which colourspace to view on my TV (Sony XD93) so as a workaround I can force sRGB/BT.709 which corrects the image.