Yes it is. We get intermittent failure to communicate. I am told by Clover that it is a known problem and started after a Virgin change of some sort. have asked Virgin for details but I have nothing more yet. Thanks for your interest.
is it just a dodgy wireless connection (entirely possible) or is the device connected to teh network but then not sending / receiving data from the Clover servers?
To be honest, you're likely gonna get better support from Clover and/or their own community forums (if they have them?). Not sure how many other Clover users you'll find around here that are able to help.
Clover did not reimburse, I tried the 4g solution first but I needed the Clovers to interact with my tills so have used Wifi and directed the traffic away from the Virgin line to a backup line using my Draytek 2862ac router and this works just fine ( basically an Openreach line from another provider). Clovers are otherwise a good solution and the interaction with the Tills helps productivity.. Very frustrating that Corporate Clover are not sorting with Corporate Virgin..