Custom terms language information

[RistoNiinemets]

After following the instructions to migrate from WPML to Polylang with this plugin, I've encountered an issue where WooCommerce attributes (pa_X taxonomies/terms) do not get fully migrated correctly.

For example, I have a attribute Kivi (pa_kivi - means actually Stone for reference):
https://share.konekt.ee/i/6k9kDT

Currently activated (and default) language is Estonian. As you can see from the picture, first two terms are "Agate" and third is "Ahhaat". Third one (Ahhaat) is original, Estonian. Second one is actually English translation of the third one. Weird is that it shows EN_US flag there, but it's listed in Estonian. First one is just a mistake :)

Interesting enough, when I open the second one (Agate), and set language to ENG, then it recognizes and prefills translations that it may have:
https://share.konekt.ee/v/aBn5ju

Also from there you can see that when I open the Agate, you can see RUS translation attached to it. However, after setting term language to ENG, it loses that connection.

This issue has been at least two times (different WooCommerce shops) with both pa_ (attribute) taxonomies and Product Category taxonomy.