Evening Yevgeni,
You are correct, there will be a meeting (T.B.A), but no there has been no more information other than "due to a complaint" & then "H.R is still looking into an issue."
I was contacted tonight about contacting the Manager tomorrow, so I specifically asked regarding procedural fairness about the nature and seriousness of the alleged behaviour, but was referred back to tomorrow's contact without elaboration.
Thank you for your time and effort.
In appreciation,
Jhor