Hi.
If going from frontal mode to side mode, the it will reply on the rear 90degree proxy first.
If going from side to frontal mode it will be the front right 0 degree proxy.

If going from frontal to side ways mode, the actual joystick selection will start to rotate the rear wheel to 90. Once it sees the 90 degree proxy it will the start to change the front wheels to 90. Once the front wheels get to 90 the sequence is completed.

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Hope this helps.