Same problem here: I don't know how others do it, but for me I can't get a decent zonefile going, no SPF, DKIM, DMARC or any other txt record works.
This is such an important part of hosting, I can't afford to struggle and lose so much time with something that should always work and is robust!
no replies either from support, so it seems this forum for bugs is just a way to get rid of frustrations......
No fixes, only thing what I notice over the last weeks was a logo, omg i really don't care about a logo, i need something reliable!!!