Thank you Walt for your feedback,
My workflow is the standard workflow for opening an existing image. It looks as follow:
I open Affinity Photo. No document is opened. The standard "New document" dialogbox is automatically opened.
Because I want to open my TIFF picture I select the command "Open... Ctrl+O" in File menu. Then the "Open dialogbox" is displayed.
I select the TIFF file with sRGB color space
Affinity opens the picture. At the top of the screen is the information from my second screenshot.
I don't understand why panoramique is displayed at the top, but it is always the case with my french version of Affinity. In my use case i am not using the command "new panorama" of the file menu.
Thank you in advance for your feedback.
Best regards