[3.0] Tax is applied on variable product that already have tax included

I just updated to 3.0.2 and during testing it seems that the prices of variable products are increased with tax, even though my settings (https://i.imgur.com/zHwoZGh.png) are set to already include tax. Items that are 20 EUR (with tax included) have suddenly become 24,40 EUR (21% Tax). It only happens with variation products, not simple products. Before the 3.0 update it was fine…