Rated 4 out of 5 stars

Very useful. The original Thunderbird should behave like this. But deleting or stripping attachments does not work with CompactHeader activated. Please fix it!

Sorry, I cannot reproduce this error. Can you try to disable/uninstall all other addons. Does this help? What operating system/Thunderbird version? Please post details either here, on github or the support thread on mozillazine.