WP site which receives ics feed shows source venues as categories

All current versions.
Recently installed venues add on on https://www.tashminaconcerts.co.uk.

Problem: different site (www.tashmina.co.uk) receives the events via an ics feed from tashminaconcerts.co.uk. Events on the receiving (of ics feed) site add the venues as categories! Why?

This means I cannot use venues on the concerts (source) site after all; category means “artist” on both sites, and I can’t have all the venue names showing up as categories on the receiving site!

I would like to be able use venues though, and am sure it is not meant to work this way..?…So, some further points:

All is fine on the concerts (source) site because it recognises the difference between venues and categories properly. Why is this distinction lost when the event goes into an ics feed?

Is this a bug or feature? Shouldn’t the venue be carried properly by the ics feed? Then it could either be ignored or used, depending on whether or not the receiving site/calendar used or could handle the venue field, or not?

https://www.ads-software.com/plugins/all-in-one-event-calendar/