Computer presentation vs mobile presentation on androïd tablet

Hello

Maybe the answer/solution exists amongst the thousands of thread ... I don't find it

I read several forums mainly on a Samsung Galaxy tab 6 instead of my laptop (95% vs 5%)
On differents forums, the first appearance is "mobile version", then I check the "computer version" option and it is set forever. For SRP, and for SRP only, if I leave the navigation on the forum to come back on my gmail account, the next click on a SRP notification leads me on the "mobile version" of the forum.
Is there a setting that I missed?