Help me figure out the cause of these light leaks/exposure issues.

Hi everyone,

I shoot with an Olympus OM-1. I load the film, develop it, and scan it myself. Some of my negatives show these kinds of light leaks/bright streaks (see attached examples).

I'm trying to figure out what's causing them. Could it be an issue with the shutter speeds or shutter operation? A development problem? Or could it be related to the lens (Zuiko 28mm)?

Any ideas would be greatly appreciated.

https://preview.redd.it/rpwis0bizp6h1.png?width=1051&format=png&auto=webp&s=585f282e721c894eab600b1b342fcb6dc211923d