Latest Maps update = chronic Searching for GPS error

Recently updated Maps app (to v.9.26.1). The next time I used it, I encountered a chronic 'Searching for GPS' message. The map can find my desired target, & 'see' my location, and plot the route, but I get no audible feedback (making the functionality pretty much useless).

All help welcome.

Nexus 5 / Android 6.0.1 / 3.4.0-gd22e409 kernel (25-May)