I have tried Waze and it does exactly the same thing. Distances always correct, but turn indicator wrong.
I don’t have a problem providing routes but it does not seem to be route dependent as such as I have tried quite a few.
Basildon in Essex to Ware in Hertfordshire. Most turns are incorrect on the repeater. Some, however, are correct but mostly incorrect.
Billericay in Essex to South Woodham Ferrers in Essex. The same again, most are incorrect.
Basildon in Essex to Portsmouth in Hampshire. Most are incorrect.
Also, the reverse of the above routes. An example is coming along the A10 from Ware in Hertfordshire approaching the M25 roundabout. Sync 3 screen says first left which is correct. The Nav Repeater shows a go all the way around the roundabout and come back on yourself. Both show the correct distance of 0.2 miles and the audio is also correct.
Again, this is only when using Android applications and they are working correctly on the screen. They provide perfect navigation but only the nav repeater is wrong which is annoying.