The NHS Covid-19 app has stopped engaged on some Android telephones, with customers reporting being caught on the loading web page.
Individuals expressed concern on social media that it could imply contact knowledge was not being uploaded and customers wouldn’t obtain publicity notifications.
Some consultants speculated it was a wider problem affecting different Android apps.
The Division of Well being is trying into the matter with Google, which has not responded to a request to remark.
A Division of Well being spokesperson instructed the BBC: “We’re conscious of a problem affecting Android customers of the NHS Covid-19 app who’re receiving a loading display notification.
“We’re working with Google to urgently examine and resolve the difficulty as quickly as doable.”
In November, the same drawback meant the the app stopped working for a lot of iPhone customers, though Apple stated it didn’t assume the issue was its fault, as a result of apps in different international locations weren’t affected.
On the time the NHS instructed customers to reset their iPhone location and privateness settings, and to ensure that they had probably the most up-to-date model of its working system.
The England and Wales NHS Covid-19 contact tracing app had been downloaded greater than 20 million occasions as of two December.
Scotland and Northern Eire run separate apps.