Thumbs in loop mode poorly tracking main slider

[nexces]

This is a (multiple allowed):

• bug

• enhancement

• feature-discussion (RFC)

• Swiper Version: 6.0.1

• Platform/Target and Browser Versions: all

• Live Link or JSFiddle/Codepen or website with isssue: https://codepen.io/nexces/pen/bGEmRoM

What you did

I've setup main slider with 8 slides and thumbs slider with 6 slides per view and 6 slides in group with loop and
blanks filling - codepen link provided

Expected Behavior

I've expected that when moving from slide 6 to 7 on main slider, thumbs will transition to left revealing 2nd group of slides with slides 7&8

Actual Behavior

When moving from slide 6 to 7 nothing happens, and when moving from slide 7 to 8 thumbs are transitioning to right.
Same happens with change from slide 8 to 1 (nothing), and moving from slide 1 to 2 - thumbs are transitioning to right.

[ygj6]

@nexces This example is similar to your example, but there are no problems you describe.
https://github.com/nolimits4web/swiper/blob/master/demos/310-thumbs-gallery-loop.html

[nexces]

@ygj6 Indeed, however:

• I'm not using freeMode
• I'm using slidesPerView, slidesPerGroup, loopFillGroupWithBlank

And I'm pretty sure that this option combination might be responsible - it just might as simple as bad comparison ( ">" instead ">=") or something similar