Please report this by submitting a support request at https://support2.magix.com/customer/en/vegas/form That's the best way to draw the developers' attention to bugs and get them into their backlog.
Re: [Ticket#2018053017004296] VEGAS Pro: Request Support
Hello Joelson,
Thank you for taking the time to point this out to us. This is a known issue and we plan to resolve this issue in a future update of VEGAS. We understand your concern and hope that the workaround solution is not too great of an inconvenience to you.