It has nothing to do with bad german tagging, if there aren't special junctions, then where is the difference to other types of Highways?  In the english wiki to hw=trunk in the section to Poland there is the sentence: „They are also allowed to have at-grade intersections in exceptional cases, but since 2020 no such intersections exist“. If this sentence is wrong or outdated, it should be corrected. And didn't there was an agreement in the polish forum that „bezkolizyjność“ is necessary for a trunk? If not, I will reset the changeset.
Sorry for not asking in the polish forum first, I will looking for such things next time. 