Hello & Welcome to Just Answer,
Sorry I didn't see your question earlier and to hear of any issue you are having with your device.
To help you with this issue, may I ask:
1) Has the device you are working with been RECENTLY updated for maps?
2) The AGE of the device?
3) WHEN did this issue first begin or was noticed?
4) Does this happen with just ONE street, or does this happen for multiple streets?
5) What is the street NAME and highway NUMBER?
6) Can you also send along the CITY/STATE where this street is located?