Like most everyone else, I am having trouble with the swipe-to-call feature.
I upgraded my S8+ to Pie a few weeks ago and I'm almost certain I have successfully used the feature in recent weeks.
However, today it stopped working. I can make a call directly from the Message app using the aforementioned phone icon in the title bar.
My experience differs from others in this thread because I had the ability but it seems to have gone away *not* as a result of the Pie upgrade.
I have the same issue. My workaround is to close all opened apps in background and magically it turns working...
I can't understand why. Someone has the same behaviour ?