Let's say I have a SharePoint source list "SourceList," which has a column called "Members," which is a multi-value person field. Let's say I have another list called "DestinationList" which has a multi-value person field called "Members" as well. Up until a week or two ago, you could easily just populate the field on the destination list with the value from the source list and it would work:

Now, however, it will not work on ANY new workflows. I have older workflows which use the method above and they still work, but any new workflows always give some variation of:
The 'inputs.parameters' of workflow operation 'Create_item' of type 'OpenApiConnection' is not valid. Error details: The API operation does not allow writing a value for parameter 'item/Members[0]/DisplayName'. This parameter is read only.
I've tried manually building the array in a variable and get the same message. If I omit DisplayName from the array, the same error appears but stating that Email is read-only.
What is going on? Does anyone have a fix? To say I'm frustrated is a serious understatement. I've seen two other posts recently stating the same thing and NO ONE has said a word. I need an answer please.