Workflow Emails missing attachment

Version 7.11.2
Sugar Version 6.5.25 (Build 344)

Email templates are created with attachments but when an email triggered via workflow, no attachments received. I can confirm upload directory has right ownership and 0755 permissions.

There was a pull request with a fix for this similar issue some time back This fix is already in my code regardless of the version I’m running but still no attachments are sent out in the emails I’m receiving.

An upgrade at this stage might require some work so is there a known quick fix that I can apply to get the attachments working in emails?

Thanks in advance for your help!

Any suggestions at all? Seems like a pretty basic thing to be missing or broken