The Select Module behavior reported by the OP has existed since
Sonar X1 was released in 2010. A likely reason for the behavior still existing is that most users probably do selections using the mouse and do not use the Select Module. In other words either no one noticed the issue or no one was motivated enough to file a Problem Report.
Submitting a Problem Report is no guarantee that the problem will be fixed, but hoping that the problem will be "magically" fixed without submitting a Problem Report is a futile waste of time.
Workaround you may or may not know about: When the user sets the Now time to the start of the desired selection and clicks the
From button in the Select Module, both the
From and
To fields are set to the same Now time value. This will help prevent the undesired behavior from occurring.