PPM Mapping's VESC Tool not working

Using Dual FSESC 4.20 Plus and VX1 remote and running FOC with 2 BLDC motors. I go to setup input > Master VESC > PPM RC receiver > PPM mapping. I also turned on RT app data. When I push and pull the throttle, no data is displayed on the "VESC Tool" and "From VESC" bars on the Pulselength section. Remote, receiver, and motors seem to work fine when I hit the throttle outside of the setup. I keep going to "General" to change "APP to use" to PPM instead of PPM and UART, but it doesn't save that option, if that's a relevant problem. Could be the firmware too. I don't know if I bricked the VESC, but I have to keep manually rebooting to setup the input when it tells me the firmware is out of date, even though both VESCs are up to date on v3.61.