If you use an offline profile this would be correct as this is not supported yet
I am having the same promlem. it is tablet browser, it shows normal page on chrome, but shows the homepage on safari.
Just ran into the same issue, weird thing is that it worked up until now. (Mx 8.18.9)
In the safari search bar you can click on aA
There you can click on Website-Setting. And there is a switch for Desktop-Website