5a693e87_Plus__known_issues____RealVNC___Workaround
[ID] 341 [Description] The process of establishing a connection cannot be stopped (for example, if the wrong network address or password has been entered). [Status] Under consideration. [Workaround] 
Wait for an error message or timeout and try again.
VNC® Viewer Plus (known issues) - RealVNC®
Workaround