V1.9.1 doesn't recognize airspeed sensor

Hi guys,
I have a twin motor fixed wing drone equipped with Pixhawk 2.4.6 by mRobotics.
I flew this drone until yesterday succesfully with the fw 1.8, today I flashed to fw 1.9.1 and suddendly, without any change on the parameters, the system doesn’t recognize the airspeed sensor anymore.
The airspeed sensor is this one:

It is connected to i2c bus on a splitter, on the same splitter there are:

What could be the issue that makes the airspeed not visible?

Thanks for an help

Just to cover all the bases first:

  • Check your bootloader version to make sure it uploaded px4fmu-v3_default.px4 firmware. If it only did the v2, then it’s possible the driver was not included (1MB limit). You can update the bootloader then it should flash the v3 version.
  • Try using the Dev version.

Good luck.

thanks for your answer.
I’m sure it uploaded the correct fw (the one you indicated) since I downloaded it from github and manually selected it to flash the board.

It seems to be a bug in the code, Dagar is working on it.

Great, good to know. Hopefully @dagar can resolve shortly.

Good luck.