Solved
[SLAY-1603] 'Select recipients' modal selecting all users on IE 11
Description: Selecting a recipient(s) when sending a message and clicking Done or clicking the Apply button on IE causes the modal to be unresponsive.
Workaround: The only current workaround is to use a different web browser
We'll keep you updated on the progress made to resolve this.
Great news - this will be fixed on Thursday, 11th!