Why does the email signature add an extra line break when adding a response to the incident thread?
Outgoing email, Staff Account Signatures
All Oracle Service Cloud versions newer than August 2016
Email signature adds an extra line when adding a response to the incident thread.
In case you would like to create a standard response for an agent, the standard text functionality of the product would be more appropriate. Please refer to the Answer ID 483: Creating standard responses for incidents and chat requests.
Additionally, you could also create a workspace rule to add the standard text to the thread without the agent's intervention. Answer ID 4013: Adding standard text via workspace rules.