@Alex-Kushleyev I use a Flysky FS-I6S 10ch 2.4G AFHDS 2A RC Transmitter and a RC Receiver, Flysky FS-A8S 2.4G 8CH Mini Receiver w/PPM i-Bus SBUS Output This is the same setup I used a year ago with the first Voxl IO and it used to work fine.
Yes, in QGC there is a delay when I move the sticks. Sometimes it doesn't even show the movement the first time.