Okay, so since yesterday sometimes battles will start, and I'll select all my attacks and targets for the first round, end turn... and it will set me back to the start of the turn as if none of it happened? Turn 1 of the fight won't have executed at all, it'll just send me back to my slot 1's attack options as if I hadn't done anything

This is not a case of "you have not selected a target for this pet", it's literally
> battle starts
> select attacks and targets for all party pets
> end turn
> I get put back on slot1 pet's attack selection, round 1 has not executed.

it's just real weird because it's not all battles- I kinda thought it had either cleared up with time or that it would when I swapped back to my computer

So:
site time Nov. 16, afternoon, using firefox on laptop. Doing board grinding with aeri team. Went on for maybe a few hours but cleared upmaybe 4-5 hours before the end of boards.
site time Nov. 17, 4:30-4:41pm, using firefox on computer. Doing a round of fest zone with main team.
I think it happened for a little bit between these (also while I was on laptop) when I was doing a round of the Lost Grove elites?

I'm just really not sure WHY it's doing it, since it isn't affecting every battle, just some?

Video link, it took me about 5 battles of attempting to film it happening for it to actually occur, but uh. yeup.

Yeah, I think this has been happening to me for a few months

I can't quite see in your recorded video because it's just out of frame, but is the page loading an actual response? I am wonder if this is a scripting error (my assumption) or a server side issue (doubtful, because I would assume you'd receive some sort of feedback).

So, specifically, I am wondering if the "Response Loaded in:" is updating when this happens. If it's updating, it means your request actually hit the server. If it's not updating, it means that this is a scripting error (never left your browser).

predicted it'd happen when I started my fight with one of the bosses (well, hoped, since it's my first fight of the morning) and got it right
Updated the link with the new video that shows the response time numbers.
Looks like the response load time does actually update- started the round 1 submissions with "Response Loaded in: 0.043 seconds.", after we hit E to end turn it updates to "Response Loaded in: 0.051 seconds.", and then updates to "Response Loaded in: 0.170 seconds." after the successfully registered second attempt

Does this only happen in the Festival zone or does it also happen elsewhere, such as the Lost Grove?

almost 100% positive it has been happening in the grove as well, not just fest zone (I'd check but it's nearly half-past-midnight over here right now, but, yeah, almost positive it was happening when we were doing our elite rounds too)

The code for exploration/battling is an absolute disaster. So it's extremely difficult to parse through at this point.

I added a couple error checks that might catch what's going on and provide more information to help me figure out the root cause.

If this happens again, please let me know if it returns an error or still is doing absolutely nothing.

Still happening, and in the same way, no error message

Just wanted to say I've been experiencing this exact same issue for quite a while.

Just wanted to chime in that this has been (and still is) happening to me since the beginning of fall fest when I came back to the site.