I’m glad to hear that the issue seems to be resolved—although I’m not entirely sure if “glad” is the right word to use here. If there hadn’t been any response from the manager, I was starting to think I might need to message the forum manager directly, but for now, I’m relieved that things have settled down. 
Honestly, strange bugs like this do sometimes happen when using Wix. But that’s not something unique to Wix—it’s a reality of working with systems in general. There are times when unexplained issues arise and then mysteriously resolve themselves without us ever understanding why.
Still, I believe there’s always some kind of cause behind them. 
For instance, my Panasonic HDD recorder at home recently started freezing every time I tried to delete a recorded program. It’s only been about a year since I bought it.
And every time it freezes, I have to hold down the power button to force a reboot—an annoying new “feature,” if you will. And yes, again, it’s only been a year! 
But then I realized something … it only happens when I try to delete a program while another is recording.
And it turns out, I’ve already managed to fill the 2TB HDD to the brim in that one year
(by the way, my room has been a mess all year too). So now, I only delete things when the recorder isn’t busy, taking it slow and being careful not to overload it. Since then, it hasn’t frozen once. 
When we encounter system issues like this, we tend to immediately blame the manufacturer side and call it a bug. But any system can break down under temporary overload. And I do think that machines, in their own way, have good days and bad days—like us. That’s why things like this can happen from time to time.
Whether or not you call that a “bug” is probably a matter of personal or philosophical belief. Of course, if it turns out that something on Wix’s end is causing ( some overloads ? ), it’s definitely something worth investigating. But if the issue cleared up in just one day, I personally wouldn’t dwell on it too much and would just go back to work. 
Anyway, I’m glad it seems to have resolved itself—though I didn’t do anything 