Why I can't see all publishers when creating solution

Hi,

We have recently imported a solution to a new CRM 365 environment.

The publisher of the solution is 'Default Publisher for EA' which I can see under 'Publishers' on Customizations.

The problem is when I tried to create new solution and want to select this publisher from Lookup on solution, can't see this publisher.

Below you can see I have 5 publishers

But when I clicked on lookup it is not showing all Publishers

Can someone help me to understand whats happening here.

Thanks

Bala