The WiFi does not work on my Raspberry Pi 3B+ if I boot the RPi from an SSD disk connected to one of the USB ports (Raspbian Stretch). Clicking on the "double arrow" icon at the top right of the screen shows "No wireless interfaces found". For troubleshooting, I flashed the same image I used for the SSD to an SD card and booted the RPi from the SD card. The WiFi works as expected with the SD card.
What is going on? How can I make the WiFi work with the SSD?