Activities accessed from Acitivity Summary Ribbon Load issue


When opening any activity from activity summary section, we see ribbon of that record blank.
To resolve this what we did is opened activity (phonecall/task/email etc) from activities...once page is completely loaded closed the form., now open activity from Activity summary section we see the ribbon.

We feel this is strange issue.
Is it using the cache to load the ribbon when record opened from Activity summary section?

Last ribbon state when we accessed any activity ribbon is being showed up.
Not sure how to fix this. Clearing browser cache did not help. Any suggestions.

We are on IFD deployment.