When you start a new conversation and type the start of the recipients name @rolf...
the name that can be selected is not visible unless one scrolls in the tiny window. It should be directly visible when there is only one option, w/o the need to scroll. This used to be the default behaviour but it was (recently?) lost.
I have attached example screenshots. This is in the Overview space. I did not test other browsers
Mac OSX 10.11
Chrome Version 55.0.2883.95 (64-bit)