Sort by Product Name doesn't work with Ancor and available filters

[ihor-sviziev]

On the category page when we have filters (as example - we need to define color for products) + "Ancor" is enabled for category - sorting by product name doesn't work correct.

Preconditions

1. Install Magento 2.2.2
2. Create "test" category
3. Create 3 products and add them to "test" category

• Product A (color attribute set to "red")
• Product B (color attribute set to "blue")
• Cool Product C (color attribute set to "red")

4. For "test" category in "Design" section change "Layout" to "1 column", save category
5. For "test" category in "Design" section change "Layout Update XML" to "<referenceContainer name="main.content" htmlClass="page-main products-grid--max-4-col"/>", save category

Steps to reproduce

1. Go to frontend >> Test category
2. Change "Sort" to "Product Name"

Expected result

1. Products should be sorder by name (when ancor disabled - it works good)
   
   

Actual result

1. Products are not sorted by name (product B should be 3rd, but it is second)
2. Sorting by desc also doesn't work:
   

We hadn't this issue in Magento 2.1.x, it appeared during upgrade to 2.2, so probably it's regression.

Video where I was able to reproduce it: https://photos.app.goo.gl/tfRvSIcYYNN90jUB2

[magento-engcom-team]

Hello @ihor-sviziev. Thanks for reporting. Currently we are not able to reproduce Your issue. We tried to do that on a clear instance of Magento and recorded a video about that. In fact there are three separate videos : Video1, Video2 and Video3. Please watch them in that order and tell us what we have missed or done not as You have.
Video1.zip
Video2.zip
Video3.zip

[ihor-sviziev]

Hi @magento-engcom-team,

I was able to reproduce on fresh magento installation, will try to check steps to reproduce, probably there is mistake. Will update you later

[ihor-sviziev]

Looks like this issue reproducing not every time, will try to record video or define more clear steps to reproduce.

[ihor-sviziev]

@magento-engcom-team I've updated steps to reproduce, also I prepared video where I reproduced this issue. Link to video: https://photos.app.goo.gl/tfRvSIcYYNN90jUB2