Large delay when creating a new window

There is a large delay when opening new windows. The delay is vastly exacerbated when the Start Page is displaying my Favorites. In my case, I have 36 favorites.
If Favorites are disabled on the Start page, there is still a delay, albeit not as severe.

In this screen recording, pay attention to the File menu item in the menubar at the top left. Notice how long it stays "highlighted" in Orion compared to Safari.

(btw, oops, I noticed I created a new tab in Safari instead of a new window in the screen recording. But I double checked and creating a new window is just as snappy)

I expect to be able to press Command-N, and the immediately start typing the url I want to go to. For example, in Safari, the browser is more responsive than the speed of my keystrokes. However, in Orion, I have to wait for the browser to "catch up" to my keystrokes. In fact, if I start typing my URL while the "create new window" operation is still processing, my keystrokes are lost to the ether.

Version 0.99.127.1-beta (WebKit 619.1.1)

Sonoma (14)