File diffs do not show for other participants

[jacks-uwe]

Describe what happened:

What was your system configuration?
Product and Version [VS/VSCode]: 1.98.0
OS Version[macOS/Windows]: Both
Live Share Extension Version: 1.0.5948
Target Platform or Language [e.g. Node.js]: C++

Steps to Reproduce / Scenario:

1. Start a Live Share collaboration session with a workspace that has two files in it.
2. Join the session with another participant (I tested using both the web version and the same version of VSCode running on macOS).
3. On one participant, select the two files, right click and select "Compare Selected".
4. Notice that the file diff shows up for the user who did the compare, but not for the other participant. Doing a focus on the diff panel does not work. The repro steps are the same if you switch the user initiating the compare (that is, it happens regardless of which user did the comparison).

Note: This happens on both the default and insiders channels.

macos_logs.zip

windows_logs.zip

[jacks-uwe]

FWIW I was originally trying to get this to work using the GitHub Pull Request extension. Everything I've read has led me to believe that this extension should work via Live Share, but nothing shows up for the connecting participant. I've fallen back to just this compare workflow which also doesn't seem to work.