Choice Column in SharePoint not Populating Correctly from Forms?

Did you check to make sure there are no errant hidden characters? I just ran a quick check and seems to be working correctly on my end. Was anything changed on the SP choice column side?

Is it a multi-choice selection?

I convert the string to a json object (will result in an array) so that it can be consumed by the Select operation, which will remap from a simple array to an array of objects.

Make sure to think about error handling in the following cases:

- If the selection is optional, the Select operation will fail.

- SP list expects a value from the choice list and none or one not in the list was provided.

This thread also provides another approach: https://powerusers.microsoft.com/t5/Building-Flows/SharePoint-Choice-Field-ARRAY-Requires-quot-Apply-to-Each-Step/td-p/693820