Instinct 2X Battery charge not going down since 15.08

Hello!

After updating my Instinct 2X to 15.08, I charged the watch to 100%, and since then (4 days of smart watch mode use and no exposure to sunlight), the battery has not gone down at all. Also, at seemingly random times, the battery life estimate showed the infinity () sign instead of a number of remaining days, again indoors and at night. I have tried restarting the watch multiple times but to no effect.

This leads me to believe that the watch is not properly recognizing the battery charge, since the battery life estimate does update when for example turning on the torch or using GPS.

Anyone else has the same issue?