|I am using Chrome Version 26.0.1410.12 dev-m on a Win7/64 machine.
This is a fairly frequent, but: intermittent, problem. And, I would judge it "minor," in the sense that when you do post the message any content that has not appeared in the Preview frame is in the message posted.
Omissions of line-breaks are most frequent.
While composing messages, on the Forums, including the Lounge, often the preview of the message appears to "freeze" at some arbitrary point, and never updates. And, some of the content of certain lines, at times is arbitrarily "omitted."
As you would assume, given Heisenberg's "Uncertainty Principle," this effect is not happening now, as I write this message
If this is not a Chrome bug (quite possible: lately the dev versions of Chrome have had really surprising behaviors appear), then I hypothesize (very weakly) that it could be related to the intensity of traffic on CP's servers that handle forums.
Could "live preview updating" be "dampened" (queued ?) by a couple of hundred-thousand people writing messages at the same time ?
But, when the preview update never appears, as does happen, after minutes, and much editing of the message, then I suspect something different.
Right now the only thing that temporarily "disappeared" while writing this message from the preview was one line-break, and the question-mark after the line ending: "the same time." Those both re-appeared fairly quickly.
And, in writing the final paragraph here: "final paragraph" first appeared in the preview as "final para." And, now, that's gone.
A "tempest in a teapot" ?
Whoops, the preview just left out the word "teapot:" for about ten seconds.
This thing we tell of can never be found by seeking, yet only seekers find it.
Abu Yazid Al-Bistami (Persian, Sufi, 804-872)