I updated my Kobo Glo (N613) from 2.8.1 to 3.0.0 but i have the same problem that 2.10.0. The brightness returns to 1% as soon as I turn off and I turn on light.
I was hoping that 3.0.0 would fix that but not. I returned to 2.8.1 and I don't have that. I'll stay with it until the day they'll take this problem into consideration because it's not acceptable for me to adjust the brightness every time I turn on the light.
Especially as it flashes in 1% and I have to set it to at least 3% minimum for a stable illumination.