Issue seems similar but 100% not sure.
Basically note was saved at Display attribute level which is Numeric. I tried replicating the same in quality, saved a note at by drill down to detail level. I was getting same error at total level but at detail level I was able to see Notes, but this isn't the same with Prod. Though I have saved at detail level at Display attribute, I was also able too notes in /sapapo/sdp_notes
TIA