Flash Player Safari Plug-in Issues

Since upgrading to OSX 10.11.2, my 2014 Retina Mac keeps stalling (you know the spinning wheel of doom) in Safari. When I look at Activity Manager, Adobe flash Safari Plug-in is showing 99.99% CPU (or sometimes over 100%?) and has hung. Upgraded Flash to 20.0.0.235. Still no difference. Apple support told me to go to System Manager and Flash Player and delete all Local Storage Settings and  Browsing and Data Settings. Did that and it works for a very short time then it starts all over again.

What is going on? I have tried to uninstall Flash but my 7 year old son wants to plays Lego games, so that's not an option

This did NOT use to happen.

Any ideas to correct this?