Flickering and buggy behavior when resistance is on on Vertical slider.

[vitpankin]

Check that this is really a bug

• I confirm

Reproduction link

https://codesandbox.io/p/sandbox/swiper-vertical-resistance-bug-lfy6dd

Bug description

I basically added

resistance: true,
resistanceRatio: 10

to Swiper at your Vertical demo, and bad trip discopunk started immediately. First slide only flickers\disappears when pulling up - it's buggy and meh but okay. Last one scrolls all the slider from the first one to the last when pulling down - that is a big one.

I found it on React in the first place but then checked core and it's there.

Expected Behavior

I expected it to stop on the first and last slide with no visual flickering and phantom scrolls.

Actual Behavior

First slide only flickers, buggy and meh but okay. Last one scrolls all the slider from the first one to the last - that is a big one.

Swiper version

10.0.0

Platform/Target and Browser Versions

macOS Chrome Version 127.0.6533.100 (Official Build) (arm64)

Validations

• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.
• Make sure this is a Swiper issue and not a framework-specific issue

Would you like to open a PR for this bug?

• I'm willing to open a PR

[vitpankin]

Recording
first slide
https://github.com/user-attachments/assets/b093b2be-c716-4ee1-bd96-fb0d59a5dce7

last slide
https://github.com/user-attachments/assets/c8ccf177-aec3-41d3-bbae-a95b47e87582

confirmed both mobile and desktop