Google Cloud DNS will serve randomized records from 27 Mar 2020

Currently, Cloud DNS name servers return resource record sets in the order in which they were defined.

In alignment with DNS industry practices, Cloud DNS name servers will begin randomizing the order of the resource record sets starting on March 27, 2020. This will apply to both public and private Cloud DNS zones.

Managed zone data will not be impacted; only the order of the resulting records returned in DNS responses will be changed.