Timeline Time Marker/Playhead Lagging and Keyframes Cannot Be Selected

am experiencing a serious timeline interaction issue in Premiere Pro Beta. The timeline time marker/playhead is lagging and does not respond smoothly when I move it through the timeline. There is noticeable delay between where I move the playhead and where it actually appears or responds.

At the same time, I am unable to properly select keyframes. When I click on a keyframe in the Effect Controls panel, the keyframe does not get selected, or the selection appears to be delayed/unresponsive. Because of this, I cannot easily move, delete, or adjust individual keyframes.

The problem makes keyframe editing extremely difficult because the playhead and keyframe controls feel out of sync with the actual timeline position. Sometimes I need to click multiple times before anything responds, and the interface feels like it is lagging or not registering my mouse input correctly.

Expected behavior:

The timeline playhead should move smoothly and accurately according to the mouse position, and individual keyframes should respond immediately when clicked. I should be able to select, move, delete, and edit keyframes normally.

Actual behavior:

• The timeline playhead/time marker is noticeably laggy.
• The playhead does not always follow the mouse smoothly.
• There is a delay when moving the playhead.
• Keyframes cannot be selected reliably.
• Clicking directly on a keyframe often does nothing.
• Keyframe selection feels delayed or completely unresponsive.
• Editing or moving individual keyframes becomes extremely difficult.
• The timeline and Effect Controls panel appear to be out of sync.
• The issue significantly slows down normal editing and animation/keyframe work.

This appears to be a UI/timeline responsiveness issue rather than an issue with the actual keyframe values or animation settings.

Impact:

This issue makes precise keyframe editing almost impossible and significantly affects the editing workflow, especially when working with animations that require accurate keyframe placement and timing.

I recommend checking the timeline/playhead interaction and keyframe selection behavior in the Beta version, particularly whether mouse input and timeline UI updates are being delayed or dropped.