1. Open comp with a couple clips in the deck and nothing playing
2. Enable Monitors and open Clip Panel monitor
3. Click a clip's thumbnail to start playing it.
-- The clip panel updates as expected with info and params for the clip. However, the Monitor still shows nothing
4. Select 2nd clip in the deck by clicking its thumbnail. Params for 2nd clip show up in Clip panel, but now the monitor shows the video preview of the 1st clip.
The Clip Panel Monitor always seems to be one step behind the actual selection. So you have to click a clip twice for it to properly update the clip panel with accurate visual representation.
Clicking the preview handle of a clip doesn't have this issue. It's only when you're clicking the thumbnail that the clip panel monitor gets confused.