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External Lookup field Multi Select with only 1 selection

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Hello,

I'm using an External Lookup field set as a multi select.

When the data comes into Fusion it sees multiple selected items as an Array as one would expect.

The problem is when 1 item is selected it doesn't come in as an Array. It comes in as Text.
When processing downstream, how do you deal with these type differences?  For example, adding the items to an existing array?  You can't use merge....
Does anyone have a solution?
thanks,

Kelly

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