TL-DR;
The string defined to be propagated on the "version" field of MNDP was forgotten to be updated to "Stable".
And highly probably hardcoded, not being composed by "version" + "channel" variables.
Extended version:
Today I Finally decided to use unicorn version 7 of RouterOS on a production environment.
Wich one? My house!
Better to suffer the possible mishaps of an update on your own network than be cursed by consulting clients discovering "little details" in their production networks.
A different version of the phrase "Eat your own dog food."
As you can see on the prints, I'm using "Stable" channel with v7.1 od RouterOS and v7.1 of Routerboard Firmware.
But RouterOS is propagating "(Testing)" on its Mikrotik Neighbor Discovery Protocol Announcements.
Is just a Cosmetic Bug!
I Won't affect anybody's network performance...
But brings a suggestion of the string of "Version" in MNDP be composed of multiple variables in the environment.
P.S.: I also used Wireshark to check if there wasn't any mistakes of buffers...