centerMode not centering correctly

I’ve been having issues getting centerMode to center the first slide on initialisation when using variableWidth. I find that I have to move to the next slide, and back again for Slick to work out what the center actually is.

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The provided jsfiddle required too much reworking to be relevant as this is a variable width example. I kept it as simple as possible though.

http://jsfiddle.net/1wyegw6L/16/

Interestingly in my real-world example the offset goes the other way, to the right. It actually looks like the first slide is just being offset by 50% with no correction for the slides width:

But once I’ve gone forward and then back a slide it corrects itself:

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What is the expected behaviour?

Center the slideshow with a focus on the first slide.

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What is observed behaviour?

The first slide is off-center on initialisation, but centers itself after navigation.

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More Details

- Which browsers/versions does it happen on? Chrome 56.0.2924.87 (64-bit)

- Which jQuery/Slick version are you using? jQuery 3.1.1 Slick 1.6.0

- Did this work before? Before when?