Now this surely is some crazy interference side effect between a Scroll pHAT HD and a Microsoft Surface Pro 3. Whenever I run a cute little python script that scrolls information accross the Scroll pHAT HD like mad, the 5GHz WLAN access of my Microsoft Surface Pro 3 goes mad, too. After stopping the script, the WLAN access for the Surface Pro 3 recovers.
In contrast, the Surface Pro 3 has no issues using 2.4GHz WLAN even while the script constantly outputs to the Scroll pHAT HD.
Other devices, such as a Samsung Tab S, have no problems using 5Ghz WLAN while my Pi Zero W with its Scroll pHAT HD “radiates” (as in SPAMalot??). The Pi Zero W as such doesn’t cause the interference as I could cross-check.