Adding an image would be great, then I would at least have an idea if it is the same problem we are talking about. (If you can't send it here, you can send it in the discord)
Right, your tablet has slightly too big a resolution for the pc setup, but is too wide to trigger mobile mode. I will make a programmatic fix, but that might take a while. Meanwhile, can change the web page zoom level, like you do on a pc?
