Just an update for anyone experiencing the same issue. The PX50 still does not work as expected with Zscaler when using the device in wifi router mode. They've let me know they're working on a new...

@David-TP yes this sounds very similar to my issue

I recently purchased a 3 set of px50. Works well with all my devices and has drastically improved speed through my home. Only issue is that when I use my work laptop which uses zscaler, I basically...