since upgrading my Zenfone 8 to Android 12 I am experiencing the following problem with my mobile hotspot: when I activate it, the Wi-Fi connection does not disconnect, which results in the hotspot traffic still being routed via the wifi connection. This means that I have now explicitly disable wi-fi in order to get a working internet connection if I am still within range of an AP.
If this is intentional, I am not sure how this design decision was made. If I am within the range of my wifi, I would only need the hotspot if the wifi connection is malfunctioning, otherwise I could just connect my devices to the wifi access point directly. Moreover, how can the phone be a hotspot while being connected to wifi at the same time? Does it have two 5 GHz radios?
ETA: I looked a bit closer and the hotspot does fail over to mobile data once the "this network has no internet connection" notification appears. The issue with this is that it can take a while for this to happen, or the wifi connection might just be slow but not completely offline. Why would anyone pipe the wifi traffic through the smartphone anyway? I can imagine this being some odd sort of range extender, but I would also imagine that using a phone as a backup for a failing DSL/Cable/Fiber connection would be far more frequent.