My defaults are LR defaults. I've tried with the support and it was something. I said that my issue was about the Adaptive Color Profile. After a few exchanges, he took control of my computer and downgraded to the October 2024 version of LR, before Adaptive profiles were released. And he claimed that my issue was solved, that I should stick to LR 8.0, and that he will close the session ! Weired solution !
I have insisted, he told that my GPU driver was not uptodate without actually checking. I showed him that it doesn't work even with GPU disabled. He told me that there will be a follow up by mail so I can provide him with the OG files. Still no mail so far. Adobe support is a joke. I'll update.
The support finally sent me an email, with stupid recommendations as I didn't spend half an hour with an agent to show him the issue. It was basically helpless.
But I have found a solution. A weired one since my issue also occured when graphics accelaration is disabled. I've changed my graphic card drivers to the NVidia Studio rather than NVidia Gaming and it worked. It even makes a difference whan graphic acceleration is disabled. My GC is a Geforce RTX4060 (laptop). Hope it helps.