Source Mirror: Sources which change resolution are not updated correctly

[Xaymar]

Operating System

Windows 10 1903 and higher

OBS Studio Version?

27.1

StreamFX Version

0.11.0c1

OBS Studio Log

https://obsproject.com/logs/WjWjcF0-wiadVsPT

OBS Studio Crash Log

No response

Current Behavior

Source Mirror does not match the mirrored source's size at all.

Expected Behavior

Source Mirror should match the mirrored source's size perfectly.

Steps to Reproduce the Bug

1. Create two scenes, name them A and B.
2. In Scene A, add a some source that can change size at will, such as Game Capture or Window Capture.
3. In Scene A, add the previously created source to a group.
4. In Scene B, add a Source Mirror and point it to the group created in Scene A.
5. Activate Scene B in both Preview and Program.
6. Have the resizable source change size, and notice that Source Mirror does not update.

Any additional Information we need to know?

May have been reported before, but was unable to repro at the time.

[Xaymar]

Potentially related Issues that were incorrectly reported upstream:

• Groups occasionally stop updating their own size obsproject/obs-studio#4174

[Xaymar]

Source Mirror will be replaced by #1037 in the future. Closing as not planned.