Copilot not changing frequencies

[HalalPilot 1]

I'm being handed off to center controllers pretty quickly on my flight KMDW >> KLAS. I have AI responding and changing radio frequencies checked in the settings, which worked for a bit, but now he will respond but not change the frequency. I have to tune the radio manually and flip them to active, and then he responds after. I'm using the PMDG 737 + MSFS2020.