I also have a nuvi with Lifetime Traffic. The traffic feature worked with all of the 2024.xx maps. I updated with the 2025.10 North America map and traffic does not work. I pop in my SD card with 2024.20 and the traffic data is back.
This is an obvious error in the map for our units not to be able to pick up and utilize the traffic data in our areas. Is there a fix for this or another US map that will allow our units to receive traffic data? My nuvi is also updated my traffic.xml file via GE. I have nuvi 750s (x10) and they all serve me quite well.

Thought I would add that you aren't the only one seeing this. problem.