The Shulchan Aruch (OC 139:4) discusses the potential issue that a listener might think that the blessings for an aliya are actually written in the Torah scroll. Different suggestions are offered for when and how to deal with this (rolling up the scroll, facing away etc.).
I'm wondering if anyone discusses this in the context of the original minhag Ashkenaz to say the Akdamut poem on the first day of Shavuot after the first verse of the Torah reading, or more relevantly, in the context of saying the poem Yitziv Pitgam during the haftorah for the second day of Shavuot when reading from a scroll.
Does anyone know of any sources that discuss this? Alternatively, has anyone been to a synagogue where this issue arose (ie they read Akdamut during the aliya or they read the haftara from a scroll), and if so was it dealt with and how?