Intuitively, if a user explicitly enables a feature with inherent management traffic (BGP, VRRP); their expectation would be for the feature they just enabled to work. In my opinion, the current behavior violates principle of least surprise. It also seems different from 1.3 (and earlier 1.4 behavior?)

It's me. I'm User! Happy to provide before (1.4-rolling-202308060317) and after (1.4-rolling-202308180646) VyOS configs and nft dumps for analysis. I can reliable reproduce/correct the issue by switching between those two images.

Already fixed in https://github.com/vyos/vyos-1x/commit/aaa98de536cb1b9d6ab5a18341a56543b5b57ce1