Help with UV-map in Blender {Solved}

Hello! I really need help. This problem I have for a long time. I make new mesh сomposed of several parts. This i do: new uv-layout for each part , then combined group and get one mesh with uv-layout. But when I use ЕА-mesh (as a base) and combined with new group, my UV Layout looks like a point in corner of UV-map(((( I do not understand which is why this problem occurs.
This group - EA-mesh+my new part, right - UV layout of mesh


I identify the group to merge them into one.



I get the one group where part with EA-mesh UV Layout looks like a point in corner of UV-map