Been a while, I posted before with no results...

i haven't seen any issues with voting, but reactions don't seem to be working (clicking the "add reaction" button does nothing). are you sure you're eligible to vote for the contests you're trying to vote in? some contests are creator choice, so even though it says voting is open, there will be a note that the creator is picking the winner(s). other contests are open to voting only by participants, so if you haven't entered that contest, you can't vote in it.

this official contest is open for public voting right now, meaning all users can cast a vote. are you not seeing a "vote" button under the entries there?

I usually add reactions and votes to official contests. For the link you put here I can't vote, no vote button, just details. Not the first time either.

voting for that contest was only open on the day i linked it. if you only got around to checking it yesterday or today the vote buttons would already be gone because the contest is over.

Last time I tried was of course before the maintenance ans now, but as you said, voting is over, so...we'll see next voting.