Describe the bug:
When the 'Stop' button is clicked during the model load process, the action is not cancelled and the model load continues.

Steps to reproduce:

1. Navigate to thread
2. Initiate the model load process.
3. While the model load is in progress, click on the 'Stop' button.
4. Observe that the model load process does not stop and continues until completion.

Expected behavior:
When the 'Stop' button is clicked during the model load process, the action should be cancelled immediately and the model load should be terminated.

Screenshots:

Environment details:
Happening on all OS using latest nightly build