Mamba F405 DJI mini - only 3 motors spin on INAV 7.1 and other versions

[rcflyers]

Current Behavior

<INAV 7.1 flashed to Mamba F405 DJI mini stack with Mamba F35 4 in 1 esc using Mamba F405US as target. On motor test motors 1, 2 and 3 all spin up ok. Motor 4 does not move. Same issue on INAV 6.1.1. Both Dshot 300 and 600 selected in config.
All esc's appear ok in BL Heli configurator
If I reflash Betaflight to the flight controller all 4 motors spin as expected when tested>

Steps to Reproduce

Expected behavior

<All 4 motors to work>

Suggested solution(s)

Suggested solution(s)

Additional context

https://drive.google.com/file/d/1QOlckp6i2WwzC6e0GXxA5d1n2Hh5I3PH/view?usp=sharing

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# version

INAV/MAMBAF405US 7.1.1 May 6 2024 / 11:57:17 (dd91a87)

GCC-10.3.1 20210824 (release)

• FC Board name and vendor:
• INAV version string:

[rcflyers]

Both Dshot 300 and 600 selected in config should read Both Dshot 300 and 600 individually tested in config with same result