In addition to providing the best route to your destination, Google Maps also shows real-time alternative routes as you drive, which may be slightly slower or faster than your current route. These alternative options can be especially useful in situations where you encounter traffic jams or an obstacle in your path. However, if you've used Google Maps for navigation recently, you may have noticed that the app has stopped offering alternative route suggestions.
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According to numerous reports on Reddit and Google's community forums (via 9to5Google), Google Maps is no longer showing alternative routes while driving. The issue appears to have started in the past few weeks and is affecting Google Maps users on Android devices and Android Auto. None of the usual solutions, such as restarting the app, clearing the cache, or restarting the device, seem to be resolving the issue.
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While Google has yet to officially acknowledge the issue or explain its cause, it is believed to be a bug caused by a recent update to the app or servers. It is not yet clear if the issue is widespread, as Stephen Schenck confirmed that he saw alternative route suggestions while driving as recently as last weekend. At this time, we cannot confirm whether the issue also affects Google Maps on iOS and Apple CarPlay.

We expect Google to provide more clarification in the coming days and will update you as soon as we have more information.
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Based on the above, it appears that Google Maps is experiencing a technical issue that affects the ability to display alternative routes during navigation — a function that many drivers consider critical, especially in cases of unpredictable traffic or road obstacles. The fact that Google has not yet officially positioned itself increases uncertainty among users, while the various forums and user communities have become the main means of information and exchange of experiences.
Source: androidauthority
