I have had the vis nav for a while now and having owned the Previous 2 versions it’s been amazing.  In the last week or so it’s been playing up.  It’s getting lost, it’s stuck (but there is nothing there) it can’t find the dock etc.  I assume it had gone faulty so contacted Dyson and without any hassle then have sent a replacement.  The replacement arrived today and it’s displaying the same issues.   I notice a firmware update recently- could this be the cause? I wasn’t quick enough to stop this neW one updating!, is there a way to downgrade to ‘test’.  
 

anyway any help much appreciated - the house is the same -

no changes so it’s a bit Confusing!