ESC not recognized on FC

[atomic oyster]

Hi !
I built a drone few months ago, and I suspected an issue on the gyro of my FC, a speedybee F405v3.
I ordered a new FC, this time the speedybee F405V4, I installed it, soldered everything. I'm now having an issue with the ESC that aren't recognized neither in BF nor in ESC configurator. I tried to plug my old FC, the V3, and they're working, making sound and they appear on the ESC conf.

The ESCs are the one of the F405V3 stack, aka the BLS50A, running bluejay.
I'm running BF4.5.1 on the new FC and 4.5 on the old one. I tried to use the diff all and the stock settings, nothing changes
Is there any compatibility issue between these and the V4 FC ? Or am I doing something wrong ?
I didn't find answers on the speedybee documentations

Thanks for your help

I'm having this message every time I open the motor section of BF

[karmic fog]

Looks like a BF configuration issue. Can you post a !supportid?

[nimble lantern]

Betaflight Support

Submit Support Data

1. Open the CLI tab
2. Click the "Submit Support Data" button

• Optionally enter a brief description of the problem
• Wait for it to finish

3. Copy the resulting support ID

Check the image below for visual steps:

[karmic fog]

Reflash Betaflight with motor protocol set to DShot

For some reason many of these speedybee FCs come flashed with a nonsensical list of defines

Should look like this