[Bug]: Can't get Preview to detect more than 4 frames on Coolscan V-ED #1229

NegPy version / build

0.62.0

OS

macOS 26.5.1

Scanner

Nikon Coolscan (specify model below)

Scanner model / details

Coolscan LS-50

Light source

stock

Correction mode

Not sure / didn't touch this setting

Input ICC profile (if any)

Relevant process-tab settings

No response

What happened

I have BW film strips cut into 6 frame long pieces. Adapter installed is the standard SA-21.
No matter how I rotate them when inserting into the scanner, in the preview section only 4 frame gets detected consistently, with a heavy offset.

Film setting is at BW Negative, Film format on Auto (but tried setting 135 directly as well), backend obviously nkscan, Framing is on All Frames.

Source file

Screenshots

No response