Same Problem with an erisin px3 2GB headunit. (Erisin 3491 )
Mcu Update 2.60 not fix it.
Have you found a solution?
There are no "Erisin" units - Erisin are a seller only - to find out what unit you have go to settings/about device - the 3 letters after "MTCD" or "MTCE" will tell you what device you have.