WLAN Access List cannot be configured with Winbox

7.0beta1
Winbox 3.19
RBD52G-5HacD2HnD
When creating a record you cannot set an adequate signal level (signal-range).
Winbox will throw an error: <Error in Signal Strength - range in [-1;120] expected!>
Of course no one can connect with a minimum signal level of -1 ))

When using CLI there is no such problem

As stated here: http://forum.mikrotik.com/t/how-to-report-issues-in-v7-beta/133088/1

Current state of GUI (WebFig and Winbox) are not completely up to date in RouterOS v7. Report only issues visible in console.

Closing the topic for now.