Hi @AlisonSpooner,
Thanks for sharing the update, and I'm really sorry you're still running into this issue.
Since you're using a large interactive display, I'd recommend temporarily disabling the touchscreen to see if that helps bypass the unresponsive Touch Workspace. You can follow the steps mentioned on this official Microsoft page to disable it:
https://adobe.ly/3IV2crW
Give it a try and let me know how it goes.
Abhishek