Instinct Crossover charching and battery indicator problem

Hi :)
While charching my instinct crossover battery shows e.g. 60%.
And when disconnected, this value increases by several percent and the watch shows, for example, 65%. After reconnecting, charging still shows 65% and charging continues.

The second symptom is:
charging ends around 90% and suddenly full battery (100%) is shown.
After disconnecting the charger, the battery shows 100%.
Reconnecting the charger no longer charges the watch.

Do any of you have this symptom in your watch?

Regards
Peter