Reply/Forward always uses subject of request, not the subject of the last exchange

We are running 7.9.0 build 7916 of SupportCenter Plus.

When we use a canned response in a reply or forward, subsequent reply/forward actions reset the subject line to the original subject, not the one we're responding to.
Example:
a. User sends request w/Subject line: ECF Strike 12-12345
b. Help desk staff "replies" to request w/canned response, and Subject line is changed to
ACTION REQUIRED: Deficient Filing in case 12-12345 Steven Dhillon, et al v. Alejandro Mayorkas, et al [ID: ##3731##]
c. Attorney responds to our request with a PDF, and it's still not correct so we have to contact them again.
d. When we open the attorney reply in the app and click Reply, the Subject line is reset to the original subject: ECF Strike 12-12345 [ID: ##3731##]

Is there a setting somewhere where I can say to always use the "latest" subject line?
Our current workaround is to change the subject of the request - which means several extra steps for our help desk staff.

Thanks -
Annette