ECN-2 development issue?

[mrche]

Hello,

I've got a Kodak Vision3 250D film from the lab, and it has some strange stains on the first 4 frames. The lab says that "The developed negative shows signs of fogging from perforation and other contamination during exposure", but it doesn't seem so to me. This is the first time I have this problem, no previous films had it when using the same camera (Horizon 202). The remaining frames look good. Am I wrong thinking that the problem is on their side?

Thank you in advance!
Alex

 

[Samu]

As always, showing inverted and edited scans does not help very much. Please, post a picture of the actual negatives.