It's possible Romans are going to break the alliance with Huns (just guess, but it ids a normal AI behaviour).
Related to this:
I had an alliance with 3 countries :
All of them wanted to share wision, so i shared it.
Next turn C2 and C3 said it is dangerous, so they removed vison (and i removed it too)
Next turn C2 and C3 asked again to share vision ...
There is a team with Romans + Hunic
I am allied with both I share vision with Hunic
Why does Roman NOT share their vision and keep saying it is dangerous !
It would be easier to see that i share vision with them (as it is the case through Hunic common allied)