Sorry I couldn't help with what changed in the new firmware like the port used.
I did see your update of 15.1.3 beta 1 and it is working for me!!
Thank you so much for such a fast turnaround!
I'm in the Beta group, and 4.9.7.798 of the firmware for the V2 Wyzecam became available. I updated my 4 Wyzecams which I use with Tinycam pro. After the update TinyCam pro cannot connect to the Wyzecams.
Works fine in the Wyze app of course, but I think they've changed something on the camera...