Loop mode, slidesPerGroup, and initialSlide does not work as expected together

[allenOrangeXu]

Check that this is really a bug

• I confirm

Reproduction link

https://codesandbox.io/p/sandbox/swiper-slides-per-view-auto-forked-3t6nn6

Bug description

I tested with 9 slides and the following config
{
slidesPerView: 3,
slidesPerGroup: 3,
centeredSlides: true
}.

Initially Swiper display {8, 9, 1}, But I think it should be {9, 1, 2}. After I slide left, it goes from {8, 9, 1} to {7, 8, 9}. Then it slides in group of 3. Also, if I set the initialSlide, it does not make the slide as the initial 'center' slide.

It seems initialSlide is a little misleading in the loop mode. As it does not guarantee to be the 'active' initial slide with slidesPerGroup > 1.

Expected Behavior

No response

Actual Behavior

No response

Swiper version

11.2.6

Platform/Target and Browser Versions

macOS

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