Can not Javascript command - Selenium 4.7 Safari - NotImplementedException

Hi we needed to run our test suite in Mac/Safari.  Any Javascript ran with .ExecuteScript()  results in  System.NotImplementedException : POST /session/84C2EE5C-6F85-4F5C-94A7-21D0B4FD0F08/execute/sync
Build info: version: '3.14.0', revision: 'aacccce0', time: '2018-08-02T20:13:22.693Z'
System info: host: 'macsi4493-3.local', ip: 'fe80:0:0:0:e2:382f:91c1:3621%en0', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.16', java.version: '1.8.0_112'
Driver info: driver.version: unknown
TearDown : TechTalk.SpecFlow.SpecFlowException : POST /session/84C2EE5C-6F85-4F5C-94A7-21D0B4FD0F08/execute/sync
Build info: version: '3.14.0', revision: 'aacccce0', time: '2018-08-02T20:13:22.693Z'
System info: host: 'macsi4493-3.local', ip: 'fe80:0:0:0:e2:382f:91c1:3621%en0', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.16', java.version: '1.8.0_112'
Driver info: driver.version: unknown

We are using Selenium 4.7