701 Supermoto 2020- Speedo Fault

Hi guys,
i have a problem with speedometer on my 701 SM and i need your help.
After battery charging i put battery back. Motorcycle run normally, but only speedometer shows a speed between 3-5 km/h when the motorcycle is stationary or i shake bike very gently. Then show speed between 200-299 km/h when the motorcycle is moving. And the kilometers on ODO are adding up very quickly. I clear rear wheel sensor, front wheel sensor, i check 12V battery, i change small battery on dashboard, but everything without success.
Display unit shows any error code.
Do you have any idea, where the problem can be?
Thank you!