Discrepancy in OM Extension warning messages between Redwood and Classic UIs

Summary:

We have lots of warning messages defined in OM groovy extensions. They show normally in classic UI, while in Redwood it is returning "The XXEXTENSIONNAMEXX extension didn't finish during the On Save event. Problem:" before the actual message.

Customer wants to see actual message only.

Content (please ensure you mask any confidential information):

Example:

varMessage = "Hold applied.";

messages.add(new Message( Message.MessageType.WARNING,varMessage));  

…

results in:

• Classic UI: Hold applied.
• Redwood UI: The Apply Hold extension didn't finish during the On Save event. Problem: Hold applied.

Customer is using Redwood and wants to see "Hold applied." only.

Version (include the version you are using, if applicable):