Okay, I did some testing and here's what I found. If you download the 0.16b version Eva Lovia route actually works (you can flirt with her) so that was a good sign until I updated the game to 0.17a (didn't check if it still works on 0.16c and d version), the option to flirt with Eva is gone. But Yuna event after tea didn't trigger (tested 0.16b, 0.16c, 0.16d, 0.17a) while coming back home at 7PM during weekdays. Looking on the changelog Eva story was rewritten and some new scenes were added on 0.17a so I guess thats what caused it. As for Yuna I have no clue where could be the bug (or is there an insane or bad condition for relationship to trigger the key event)
Edit: There is also a potential bug while doing project for Margot, if you say no you will lock yourself out of it (you can go to the party again but she wont pick up the phone, you cant also progress it with the CEO).