Thingworx beta Widgets

I as using thingworx 8.5 , while i am using the beta widgets i am facing Some peculiar issues.

While designing the mashup everything seems to be fine but while in runtime the beta widgets are not displayed except for the beta responsive tab.

This happens mostly when add  anew container or try to cut/paste widgets.

this happens often and was very frustrating.

request your help.

Note:

I have enabled the beta widgets in platform subsystem, tried disabling and enabling it again.

refreshed the composer , restarted the server but none of these helped.

this is kind of urgent.I like the AESTHETICS OF THE BETA WIDGET MUCH but this prevents me from using these widgets.I