Weird damage pattern on 120 film (Rolleiflex)

After I got my film developed in a local photography shop I noticed this very unusual "light leak" damage and a pattern of dots to go along with it. It only affected first frame of two rolls that I have looked at for the most part. Some of the subsequent frames display a bit of a dot pattern as well but no light damage (I think). Has anyone ever seen this kind of issues? Is that a damage done during development, during travel, during storage, or while inserting film into my Rolleiflex Automat MX?

 

Are those spots on the film or in the film? On the film would be bad process, in the film could be a light leak or bad fixing/stabilizer. If storage had humidity or extreme cold the paper backing could cause damage to the film.
Scans are dusty.

 

The dots are very regular. Neither dust nor light is likely to be that regular. To me, it suggests a mechanical issue.

As above, are the dots on the film in in the film?

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Could be scratches from a frozen, corroded, or dirty roller. The film gets pulled over a few roller bars before getting set in place then over at least one more before entering the take up roll. If the bar is not spinning freely it may be scratching the film or if its dirty, rusted, or corroded it may be impacting the film as well. Take a look at the film path and make sure all roller bars are clean and moving freely.

 

Through the paper backing?

It could be created at the lab as well. Poor maintenance, dirty machinery etc.

 

120 Kodak Portra 800

After few people mentioned it I looked closer at the film itself and I believe the spots are on, not in, the film. So I should assume this is a damage from the lab and cannot be cleaned via alcohol or something?
Also - that nasty lightleak - could it be from me inserting the film and advancing it a bit too much before closing the backing?

Thank you for all the responses!

 

I'd try another roll using a different lab for processing and see what happens. It doesn't seem consistent enough shot to shot to be the camera.