OO 10.70 - Central not displaying HTML span tags

Hi, 

We are experiencing html SPAN tag styling differences between Studio and Central within either User Message or Prompt Text

In studio HTML span tags are displayed as expected.  However, with Central they appear to be stripped out ( See below )

Can anyone please advise and/or experienced this issue ?

We are running 10.70.

Thanks in advance

J

 

htmltags_studio.PNG 

 

htmltags_central.PNG

htmltags_source.PNG