Premier Pro MOV file to M Disc Issue

Hello

Don't know who to ask. I do most of the film work using Premiere Pro so I need to ask here.

The results of the edited work were 10 films, around 8GB in size, MOV format. 

The client wanted the films on a 100GB M Disc. Using  OWC Mercury Pro I copied the 10 films to a 100GB Verbatim M Disc. I then tested the finished disc on two computers. The films played fine, audio and video playing with no issues.

The client said he played the films (the 100GB M Disc) with the BluRay players and noticed that the audio would drop out, that the film didn't play smooth. That there were issues.

I use HP Workstations here at this location. The client uses MacBook with BluRay players. 

It the issue with the 100GB four layered M Disc playing on specific BluRay players through a MacBook?

or possibly a processor issue? Struggling to determine the cause of the client's difficulties. 

A 100GB M Disc is costly if those materials sent to the client fail to meet his expectations.

Thanks for any insight, advice !