Contextual Menu disappears

2 Finger Tap to get Contextual Menu (control-click) brings up CM which disappears before I can use it.

Magic Trackpad 2 on my iMac

If I quit BTT the 2 finger tap works - CM comes up and stays put

27" iMac late 2013 - Type of Mac:
10.12.6 - macOS version:
2.511 (848) - BetterTouchTool version: