PX4-Autopilot: KakuteH7 firmware very slow on startup

When flashing the KakuteH7 with the latest master build, the FC boots very very slowly (taking up to 20 seconds). The default Betaflight firmware does not have this issue. I’ve also tested removing a lot of the modules to see if that would change things, but it didn’t. Because of this, the ESCs do not get the proper commands on time and thus never finish the startup sequence. Only way now to use it is to power the FC first by usb cable, wait until it has completely booted and only then power the ESCs.

To Reproduce

1. Build the KakuteH7 bootloader (latest master) and flash it using dfu-util.
2. Flash the custom master build using QGroundControl
3. Now the FC takes about 20 seconds to boot, which if using the batteries results in only the first three beeps of the ESCs, but not the two last ones.

Drone:

• Custom drone with the KakuteH7 FC and Tekko32.