Big Sur 11.1 battery ZERO at sleep

Since upgrading to Big Sur 11.1 on my MacBook Early 2015, I experience a weird situation. When my computer goes to sleep (set at 1minute when idle on the system), or when I call the sleep function, my MacBook does not wake up, showing ZERO battery. I need to do a full start, with all peripherals (second screen, USB disks) disabled. 2 minutes after the start, my battery shows again at 100%.

Even two hours after the start of the sleep function this already happens. The picture below illustrates this well, I think. Brutally dropping from 100 to zero, en back from zero to 100 after startup.

Anny suggestions?