Multiple controlled swiper instances

[JarrodMFlesch]

Check that this is really a bug

• I confirm

Reproduction link

https://codesandbox.io/s/swiper-controlled-sliders-ml3ur

Bug description

<Swiper> is unable to control many swiper instances with controller.control when passing an array of Swiper instances

Expected Behavior

I should be able to control the other sliders when swiping on the top Swiper component. In the example, swiping the blue swiper should also change the yellow and red swipers slides.

Actual Behavior

The yellow and red slides never change.

Swiper version

6.8.4

Platform/Target and Browser Versions

MacOS Brave/Chrome

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