Inline edit of an existing html file seems to be borked

[Ken Zarsky]

we routinely update an html file via bitbucket, just make a few text changes... but sometime in the past week or so the editor seems to be borked... can still select 'edit' and copy paste within the file, but everything seems to be off a space or two, cannot simply delete a character or backspace over it and replace, things like that.  We've been doint this process via Bitbucket for 5 years +.  Can't find any references online or in the support forum.  Anyone else seeing this?