Modal transition animation broken

[garrettelumen]

Background Information

Package Version(s):
ui-modal v11.7.3

Browser:
Chrome (All Versions)
Safari (All Versions)
Firefox (All Versions)
Edge (All Versions)

OS:
MacOS 15.7.4

Device:
MacBook Pro 2019

Component:
Modal

Describe the Bug

Modal transition animation is not present when opening and closing the modal.

Steps To Reproduce

1. Create a Button, that opens Modal when clicked
2. Create a Modal, with a CloseButton rendered in Modal.Header to "close" the Modal
3. Click Button
4. Notice the transition animation not shown when opening
5. Click CloseButton
6. Notice the transition animation not shown when closing

Expected Behavior

Smooth transition animation when opening and closing the modal

Screenshots

Screen.Recording.2026-05-04.at.13.36.04.2.mov

Additional Information

Current Workaround(s):
Downgrade instructure-ui to a lower version

Products Affected:
N/A

Are you willing to submit a PR to fix?

• Yes, I'm willing to submit a PR

Requested Priority:
Low