My Z Mail keeps loosing the TXT verification on my domain

My Z Mail keeps loosing the TXT verification on my domain

I have configured this a few times now on my web site and they keep being disconnected.

I've had similar problems with Z Campaigns as well. setting up the SPF and DKIM and all verified only to be told that it needs verification.

Is there something I'm not doing correctly although I can't understand why it would confirm it is ok and then not be verified?