Puzzler: Why doesn't Incorta know this data type in this insight?

[RADSr]

Happy Monday!  This is kind of nutty... 

I'm putting together an insight and I'm getting this:

Here's a second insight on the same dashboard:

Note here that "Transaction Date" is anonymous enough so I don't mind sharing the screen cap, but it's happening to all measures and all the fields in the filter box as well.

So, odd, right? 

Here's next level odd: In the first insight I replaced the measure by dragging the same field from the data pane and IA recognized the data type while in the editor, but when I saved and then edited again... same question mark.

So no big, right, just a cosmetic thing?   Nope, when I try to sort on this column I get this:

but of course this is *not* a formula column and it sorts just fine in the second insight.

Neither duplicating nor copy/pasting the offending insight clears up the issue.

Any ideas? 

[RADSr]

Adding another screen shot - no trickiness here, this comes from Date_US:   

[JoeM]

@RADSr - I checked with an internal expert and we both agree that this is unexpected/unintended behavior. I'm going to escalate this to support team.