Printing Notes - sometimes repeats first note, and not other

I am printing notes for an unposted sales invoice. I am only printing it in the RTC, and am displaying using the code:

=IIf(IsNothing(Fields!RecordLink_Note.Value),"", System.Text.Encoding.UTF8.GetString(Fields!RecordLink_Note.Value))

in the textbox (in RTC report layout).

For the most part, this works fine.

I have found, however, that sometimes it does not come out right, depending on the content of the notes.

If I have one note only, it works fine.
If I have two notes, where the text component is the same, but number component is different, it only prints the first one twice. For example, if the notes are "Order 1234" and "Order 1235", it will print "Order 1234" twice.
If I hvae two notes, where the text component is different, it prints fine. For example, the Notes "Order 1234" and "Order 1235 - Urgent" will print fine (both will print).

This seems like such an odd bug. I had to show it to a colleague, to ensure I wasnt going insane.

Does anyone have any experience with this? How I can resolve this?