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Multicamera IMU data mix up #4297

@menandro

Description

@menandro
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Required Info
Camera Model D435i
Firmware Version 5.11.6.250
Operating System & Version Win 10
Platform PC
SDK Version 2.21
Language C++

Issue Description

I have two D435i. When both are plugged in, polling the IMU data appears to get mixed up. It happens even when the IMU stream is disabled on one camera, and I only read the IMU in another. The reading appears to be coming from both devices at random.

This can be replicated from the rs-multicam.cpp example by enabling only the gyro and accel.
Edit: Also visible in the Viewer.

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