Tacx flow 2240 looses sensor readings


sudde my my Tacx flow 2240 has stopped working. For 5-10 seconds it works and then it stops receiving any data

the app says it is connected but when pedalling no watts or speed data is generated 

after restarting the connection, it works again for a couple of seconds and then it looses it again

any idea what might be the problem? Is there any way to reset it to factory defaults?