Blue Triangle beside 'assigned IO' but nothing indicated underneath

V12.3.1

The download triangle is indicated for CTRL7 => Assigned IO, but nothing is flagged under assigned IO.  I am not sure what / when this flag was set.

I have updated download data, and there is no change. I have downloaded changed setup data and setup data to CTRL7, no change.

For test purposes, under CTRL7 I changed an assigned IO point and downloaded, that works as normal (blue triangle appears and clears.  Any idea how to proceed figuring out what needs updating?