Hi @RoSchmi,
Please add the following codes where you need to restart the  MCU -> RTL8720 connection.
 pinMode(RTL8720D_CHIP_PU, OUTPUT); 
 digitalWrite(RTL8720D_CHIP_PU, LOW); 
 delay(500); 
 digitalWrite(RTL8720D_CHIP_PU, HIGH);  
 delay(500); 
Best Regards,
Lakshantha