On the Mavic Pro the TRIPOD_MODE_ENABLED write succeeds but the flight
controller keeps Tripod off, and the panel showed "Tripod on" for a moment
before silently flipping back. The gate now reads the key back after the write
and refuses with "The aircraft kept Tripod off." when it did not change.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>