[Bug]: AC500 + 2xB300S: 0% battery is displayed as "unavailable"

[ItsMe00007]

What happened?

I frequently discharge the batteries to 0 to calibrate the BMS.
Unfortunately bluetti_bt displays the percentage of the battery as "unavailable" instead of 0 which would be the correct display and which is correctly displayed in the Bluetti App:

What version of our software are you running?

0.1.4

What device are you seeing the problem on?

AC500+2xB300S

What bluetooth connection are you using?

ESPHome bluetooth proxy

Have you changed the integration settings?

Yes (Please write down the changed settings in the next step)

Integration settings (if you changed them)

I haven't changed anything, but "No" is not available as answer.

Relevant log output

No response