I don't know what difficulty estimating sites you guys are using, but I've found BTC.com's estimator is decent enough after Bitcoinwisdom's estimator broke:
https://btc.com/stats/diffSeems like some people weren't aware that Bitcoinwisdom was broken for quite some time and hasn't been fixed.
I think that one is still taking into account the extra blocks found yesterday when the difficulty was less, etc.
Here is the best one that is up to date after each change in real time:
https://diff.cryptothis.com/