Missing option to kiss Shadowheart? What do you mean?
Last time I played the game was on patch 3. When I romanced Shadowheart in patch 3, you could kiss her via a dialogue option. That dialogue option is not showing in patch 5 for me. Thinking about it, Withers also does not acknowledge that I am in a romance with Shadowheart.
And I just noticed, I also never got the dialogue where the artefact switches over to Tav.