Transmitter gets disconnected when throttle is maximum

so as soon as throttle crosses 50% transmitter is disarmed and blue light start blinking on amp2.8.
Evan I feel as if its lagging sometimes evan after throttle is full down motor are rotating at full speed I dont know whats happening !

Good day, can you provide info about your transmitter and receiver are you using?
Are you using ppm or sbus protocol?

Firmware versions and connections photos as well