Routing changed for IPv6 primary - now latency spikes

Evening,

Everything has been fine for a number of months since the issues with anexia-lon IPv6 were resolved, but this morning for some reason the primary IPv6 address started getting latency spikes and packet loss (see image from my monitoring). Digging into it, I've found that it's been switched from zepto-lon to vultr-lon, which it was moved from due to that very issue - detail on this post here: https://help.nextdns.io/t/q6y8g68?r=60y8dst

I presume someone did this deliberately for some reason, but can it be undone please and put back to zepto-lon as vultr-lon clearly still has issues.

Diag: https://nextdns.io/diag/0dbc9b80-4d0e-11ef-b758-1d4b3e6dcb6f

Thanks!