K-1, pass through entities

When I create a separate K1 to enter the information for a pass-through entity, and then I am asked near the end of the Easy Step questions whether that pass through entity should be combined with another entity (and it should be combined with the entity that issued the K-1 and for which I have previously prepared a separate K-1 via Easy Step) the entity that issued the K-1 does not show up on the list of possible combined entities. Does anyone else have this problem and do you know how to solve it?

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