Hello, when I choose to (show preview) through visual editor in OTRSwiki, I notice there's overlap between save changes and log out icons (+standard time icon).
OTRSwiki is private, so this is a bit annoying to test. I'm not sure if I even have permissions to access it on my WMF work account, and if I do, I'm not sure if it really is okay to use them.
I would suspect that this is not a bug in VE, but rather caused by a z-index override somewhere in OTRSwiki site styles or your user styles. Does the problem also occur on other wikis or other accounts?