BUG: [Micro:Bit v2.00] List on a newly flashed board does not work on serial

[eva-cosma]

Setup:

Board: Micro:Bit v2.00
Tock commit hash: f7e2c5c194194c55017c8b8282c64e488937ec05
Bootloader installed: Yes

Replicate

• Install Tock with bootloader (Ensure previously erased entire flash)
• List application using serial

cargo run -p tockloader -- list --board microbit-v2 --serial
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s
     Running `target/debug/tockloader list --board microbit-v2 --serial`
> Which serial port do you want to use? /dev/ttyACM0
[2026-07-03T11:28:10Z INFO  tockloader_lib::connection] Serial connection opened succesfully.
Error: Failed to list apps.

Caused by:
    0: Tock OS error: Bootloader returned an invalid header: 252 17
    1: Bootloader returned an invalid header: 252 17

Expected behaviour

Listing should not fail, should list 0 apps

[eva-cosma]

Note: this issue is flaky. It happens seldomly