Yes, that's a good suggestion if someone has Melodyne Editor.
I did just that and the analysis in Reaper/Melodyn went well.
Here is my current conclusion:
Yes, it is not and sonic artifact but I now clearly hear an acostic Guitar riff,
Yes it is predominately, if not exclusively, on the Left Channel
Yes Melodyn picks the Guitar out and isolates the individual notes.
But to ID and remove just the guitar notes would take a lot of "listening".
By the time I got to this point, I fully understood what the guitar was doing and then I actually grew to like the little lick.
Here is a quick picture. This picture shows the vocals at ~ 4.12 minutes and only the phrase, "..All you have to do is call (Guitar - 16th notes, ditty, ditty, ditty ditty)".
Leave it in or hide it or take it out. That is up to you as the producer of this cover.