MAXBOTIX mb1043 don't share data in the I2C with data flow

hi community.

I have a probleme with the sonar MAXBOTIX mb1043 that came with px4flow module .
when I connected the px4flow module with QGC via USB I get all the data optical flow and ground_distance from the sonar
but when I check the mavlink inspector in my pixhawk 4 I get only optical flow data but the sonare not share the information via the i2c link !
does the sonar work seppartlly !
how can I solve it!
thank’s for any help