STM32WB Scanning while maintaining an Active Connection

Looking for more information on how exactly a scan is performed when an active connection to peripheral already exists. How is the RF radio shared in between the scan and connection? Can the connection interval be maintained during the scanWindow or can it only be maintained in the remaining time left in the scanInterval? What will happen if we attempt to start a scan with timing parameters that can no longer support a preexisting connection interval?

We are having trouble configurating the Scan Parameters, Adv Interval and Connection Interval to ensure the connection to two devices simultaneously is reliable. How exactly should these value be chosen to optimise connection speed?

Thanks,

Daniel