USBA keyboard not connecting to MacBook Pro

I have a wired USBA Apple Keyboard w/ numeric keypad (no bluetooth). I use an Apple USBA to USBC dongle to connect to the keyboard to the Apple Studio display and my 16" 2019 MBP is also connected to the Studio display, with the Apple thunderbolt cable that came with the display.

When I first connect the MBP to the monitor, the external Apple keyboard is unresponsive and I have to open the MBP and use the keyboard there to type. If I leave the external keyboard and MBP connected to the Studio Display, the external keyboard suddenly starts working after varying lengths of time--a couple of hours to a day. If I disconnect the external keyboard or MBP from the display and reconnect it, the external keyboard becomes unresponsive again for 2-24 hrs. This happens every time I plug the MBP into the system and is 100% repeatable.

I do not know if it is an issue with the Studio Display or MBP. To try to figure this out I removed the external keyboard from the Studio display and connected it to the MBP. The external keyboard did not immediately work when I connected it to just the MBP, by itself. I left it overnight to see if it would do a delayed connection, like on the Studio Display. It's been 12 hours and the keyboard has not connected to the MBP. I'm not sure if it is possible to hook an external keyboard to the MBP, but with mine it is not connecting no matter how long I leave it. Is there a setting to allow an external keyboard to be connected to a MBP that needs to be set?

I have contacted the Studio Display community on this issue too. So far no resolution so I thought I would bring it up in this community as well.

I have a Magic Mouse which connects immediately via bluetooth and works fine 100% of the time.

Is there a way to make the keyboard connect immediately and reliably through the wired connections?