Well, this firmware has issues. I had to downgrade back to the previous .32 one.
The Guest Network would not let my IoT devices through at all. I have the Guest Network setup on 2.4 and 5Ghz channels, and let my Nest Cams and other devices connect. They would not successfully connect and obtain an Internet connection. I also tried on multiple other devices. Did a full router hard reset and set up everything again, still no luck.
I downgraded back to .32 and BAM, zero issues. Not sure if anyone else uses the guest network and has seen a similar issues.
