Hello. I sometimes get these streaks of light or overexposure on my 4x5 films. Please help me identify what this is exactly.

The image is from a campsite in Deogyusan Mountain, South Korea on Tri-X 320 (@ 1200) in Diafine 4:4 in a 2521 on a CPP2.

You can see it's more noticeable in the shadow areas:


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