I just acquired a Surface Laptop 3 13.5'' and I noticed that wifi becomes (way) slower after waking up from sleep mode. A speed test shows a decrease in the order of 90% (from 100 Mbps to 10 Mbps).
I am not alone (a couple of posts on reddit deal with this issue) and I think it affects all the new Surface devices with Intel Wifi 6. Is Microsoft aware of this issue? Because it makes Instant On feature completely useless if it costs 90% of wifi speed.
Note that I don't have issue with Ethernet.