fSpy → Blender, matching fails with strong vanishing points

[guyomem-beep]

Hi,
I’m using fSpy to match photos in Blender but I keep running into an issue.
When the image has very strong/long vanishing points (like a train station platform), everything looks fine in fSpy (axes aligned, gizmo matches), but once imported into Blender it doesn’t line up:

focal length feels too tight,

perspective doesn’t fully match,

objects look like they’re floating or slightly shifted.

This happens in about 80% of cases.
👉 Is there a reliable process that always works regardless of the image when vanishing points are strong?

Thanks!