Large dropdown lists in Modal Form cause the client to hang

Partner Rank: Medium

Verification Builds: 1.21.22 / 27262419

Regression Builds: Unknown

Summary: Large dropdown lists cause the client to hang, especially when displaying many item IDs.

Affects currently Live Content: No

Impact: The client becomes unresponsive when attempting to load dropdown lists with a large number of options, preventing further interaction with the UI. The client freezes again when clicking the dropdown to select an option.

Repro Steps:

1. Create a dropdown list that contains many items, such as using vanilla-data to list all Item IDs.
2. Open the dropdown in the client.
3. Observe the client behavior as it attempts to load the list.

Observed Results: The client hangs and becomes unresponsive when trying to display a large number of options.

Expected Results: The dropdown should load all options smoothly without causing the client to hang.

Screenshots/Videos attached: No

Notes: