Who I have the same questioned this topic

I am having this same issue. I have an iPhone XR and I’ve been using it for hotspot for over a year.

Over the past month or so, I’ve been having this issues. I’ve tried connecting to my Dell laptop and HP work desktop. The issue has happened with both but I mainly use the hotspot for my laptop.

What I see is that the laptop looses internet and when I look at my phone i see that the phone stopped providing the hotspot. What I need to do every time i have this issue is to reset my hotspot on my phone and reconnect on my laptop. It also happens when I connect the hotspot through the cable.