Weird rear flasher problems

Hi guys,

Both my rear flasher work simultaneously when I flash one side or the other.... Most of the time the warning light come on in the cluster and sometimes the flasher goes faster like when one bulb is worn out. Front flashers are working good

2006 jetta tdi
Can someone help me with this?

Thanks

Assuming your car is a sedan, I would suspect an issue with the Central Electronics module, but I would want to poke around with a scan tool a bit first to see if that is possibly the issue.