After firmware update of 27.09.2021, impossible to launch ZINO PRO PLUS
Drone angle too large Even after IMU calibration, still the same problem.
Came back old firmware.
I apologise if you have already done this but have you also done horizontal calibration on a level surface in the App? I have a different model to you and its not to hand but I'm sure I have separate horizontal and IMU calibration. My understand is IMU and gyro are two separate components.
I hope this helps.