I have had the same issues with the editor on Firefox, Chrome and Safari. I think it’s a global Wix Editor bug, regardless of browser. I’ve noticed particularly it happens when I attempt to change the size of a text field (through a click drag, not parameter input) while the text field is in ‘edit’ mode. I can notice immediately when it happens now because the ‘drag’ handle on items will disappear or will be disabled. This also causes several other glitches all around editor, especially extra ‘lag’ when dragging, dropping, selecting, etc.
This used to happen a lot more frequent but it still happens enough to be very irritating. I usually have to refresh the editor itself, sometimes even several times, or I have to end up restarting my browser all together. This has been happening for over a year, that I’ve noticed.
There was a recent post made about the same issue I had commented on as well. This has been ongoing for a looooong time. Wix all together uses insane amount of processing power. This is why this forum constantly lags (takes forever to load), the editor freezes on simple drags, and live sites take over 4.5 seconds (or more) to load, with over 20mb on load! To the comparable 2-6mb standard, this is astronomically high. All Wix sites are data hogs and have this connectivity issue for a long time now with no fix. Everytime I hit a live Wix site, theres a white screen. Usually for several seconds before anything on the page even begins to load. No matter how much code optimization, I just can’t ever seem to get Wix sites to load like other highly functional and speedy sites.