This may not have anything to do with your issue, but make sure your phone app and computer are using the same wifi network -- eg. a lot of routers might have a 2.4g and a 5g option. If the 2 devices are on separate options, the 2 apps often won't sync. Jumpstarting the linking also can work (if they are indeed on same network), by turning wifi off and then back on again on your phone.