Use the keyword Windows.switchToWindow() instead of the Windows.switchToWindowsTitle() since that keyword can solve the time-consuming issue.
To use the keyword above, please use the Spy/Recorder object feature to capture the window object that you would like to switch to and add that object to the keyword as a parameter. We suggest you that keyword since it will save your time to find the object directly without searching any title of windows.
Also, we have a tip that if you would like to ensure the system can capture correctly the existing window, you can
use the switch to Desktop before the step switch to Window.
use the highlight object feature in the Spy/Recorder object feature to make sure that only one element will be detected, and it is your desired one.