Battery Deye percentage issue with Multisplus-II

Hello everyone,
I’m using Deye battery !
This morning, my battery was unloaded. I’ve let it in charge while day, in the evening I’ve putted on my converter (Multisplus-II). The issue is : my battery is fully by showing the 5 leds (green), but the Cerbo is showing me 40% of charge.

Would you like to help me please ?

Cheer !