GARMIN ANT stopped connecting

I’m using a garmin cadence and speed sensor which has connected easily to swift before. Now wont connect. Using an Android Galaxy A50 with built in ANT, which is what the Garmin sensors are using. Both sensors work as will connect to non swift device: garmin display. Have tried following.
Resetting cadence and speed sensors push button on Garmin.
New battery
Wifi turned off and on several time
Zwift unstall and install on phone several rimes.

Recently swapped internet provider from talk talk to Sky. Worked on one occassion, outside in back garden Any help would be gratefully appreciated.