Swiper: Back button doesn't work properly when using loop, slidesPerView and slidesPerGroup

[apriljunge]

This is a (multiple allowed):

• [x] bug
• [ ] enhancement
• [ ] feature-discussion (RFC)

• Swiper Version: 4.4.2
• Platform/Target and Browser Versions: Windows (all major browsers)
• Live Link or JSFiddle/Codepen or website with isssue: https://codepen.io/anon/pen/pQRLEr

What you did

I hit the back arrow multiple times, with the config you can see in the codepen.

Expected Behavior

The back arrow should change between the groups ( Group 1, Group 2, Group 1, ...)

Actual Behavior

The back arrow always shows group 2 (Slide 3, 4, 5) ( Group 2, Group 2, Group 2, ...)

[AgamlaRage]

Same issue for me, with loop and any combinaison of slidesPerView and slidesPerGroup, when slidesPerGroup > 1.

Going backward seems to be bugged.

Items are not displayed as expected.

[tomaszmittlener]

I have the same issue with the newest version of swiper (4.5.0) . It seems that the problem appears when you try to go to previous group of slides when on the last view with even number of slides and below settings:

slidesPerView: 3,
slidesPerGroup: 3,
loop: true,

Codepen:

https://codepen.io/tmittlener/pen/BeOqBK

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[apriljunge]

Please do not close this issue.
This bug still exists with 5.2.0

[tom-schneider-aw]

Is there any update on this issue?

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[apriljunge]

This bug still exists in 6.2.0
I updated the codepen

[vltansky]

updated demo to the latest version:
https://codesandbox.io/s/ecstatic-browser-4ofod?file=/index.html