Autosuggest/Product Suggestions tax is not included in (final) price

[alpha-buerobedarf]

Preconditions

1. Magento 2.2
2. Multiple Stores
   2.1. default store A with catalog_prices excl. tax
   2.2. second store B with catalog-prices incl.tax
3. different solr cores for each store

Steps to reproduce

1. Reindex Solr
2. After full reindex search a product and take a look at auto/productsuggestions window in both stores

Expected result

1. Prices in store A product suggestions should be displayed excl. tax
2. Prices in store B product suggestions should be displayed incl. tax

Actual result

1. Prices in store A product suggestions are displayed excl. tax
2. Prices in store B product suggestions are displayed excl. tax!!!

It seems to be a problem with TaxHelper and StoreResolver,

public function getPriceDisplayType($store = null) { return $this->_config->getPriceDisplayType($store); }

If no store is set here (which isn't the case while indexing), magento is trying to get the store in \Magento\Store\Model\StoreResolver, this returns the default store A Id even if Store B is indexing,
seems to be a problem with magento itself and/or store emulation but i am not sure about that.

Patrick