I have observed that WinBox from version 6.10 clears the Windows clipboard if I click in a text or combo box field to dismiss the context menu (cut/copy/paste/select all). For example, if I have a network address on the clipboard, and try to paste it into IP/Firewall but pick the wrong field for it, the address will be replaced with an empty string on the clipboard and can no longer be pasted. Any contents of the clipboard is erased.
OS: Windows XP (a few systems).
ROS: 6.10
Can anyone confirm this behavior in this or later versions?