Multiselect attributes with custom source models in layered navigation

Multiselect attributes with custom source models in layered navigation

Hello there!

Spoiler:
You can’t use a custom multiselect attribute with custom source model in layered navigation.
You can use either a dropdown attribute with custom source model or a multiselect without custom source model, but you CAN’T use a multiselect with custom source model.
Solution is here >>

Yesterday I found an interesting bug in Magento.
I have been working with this system for the last 4 or 5 years so far, but yesterday was the time I’ve observed this bug.
Of course, you know about layered navigation, custom attributes, and source model.

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