LUT with ISF technician - Teranex SDI to HDMI 8K - bug ?

Hello,
I asked an ISF technician to come at my studio with his Klein K-10a to calibrate my RS3000 JVC.
We made 5 attempts. But each time, LUT generated by the "Teranex SDI to HDMI 8K HDR" raises "blacks" (it turns grey).
Any idea ?
I joined the LUT to this message.
Best
Robin Erard
I asked an ISF technician to come at my studio with his Klein K-10a to calibrate my RS3000 JVC.
We made 5 attempts. But each time, LUT generated by the "Teranex SDI to HDMI 8K HDR" raises "blacks" (it turns grey).
Any idea ?
I joined the LUT to this message.
Best
Robin Erard