Sharktankweek

I noticed that after a perfect tea time, I don't always get the +1 Cha bonus. Does any one know what determines when/if you get the +1 Cha from perfect tea time or how to get it more often? I have read that there may be a limit on how many times you can get it in a month (or per character) but that can't be it as this has happened on the first tea time of the month (and the first tea time for this character).

Does anyone know how the Head Chef Challenge works? It says that effects are enhanced for favorite meals but the description says that it is based on luck? Is the bonus for favorite meals only for the full menu? Is the challenge really based on luck alone or are there other factors?

I am not on New Game+ and I don't have the paid DLC. Is the wayseer part of either of those? In the bug thread it said that the bug may have been fixed and that if it said you need more time rather than you missed it, then you aren't locked out. In the second thread, there is a post towards the end that says that for Edelgard's C and C+ supports with Byleth, in addition to having to do them before chapter 11, C unlocks in 5 or 6 and C+ unlocks in 8 or 9. I was wondering if anyone knew if a similar thing happens with Dimitri.

Does anyone know what chapter Dimitri's C support unlocks in. I am in chapter 3 and the support is glowing but it says that it will take more time.

If it says more time needs to pass, does that mean that the support is working normally? I somehow got the more time needs to pass message for Dimitri's support in chapter 3 (without using new game plus). Could this be a new version of the previous bug?