I can reproduce this issue at-will every single time. Others can reproduce this issue at-will every single time.
1. Install Dropbox
2. Create the .bat ****** and .LNK file shown in the attached image
NOTE: I use a similar ****** to delete shadow copies to free up disk space and it is quarantined as well
NOTE: I use bitsadmin scripts and they are quarantined as well
3. Place both of the files created above into Dropbox folder
4. Install Bitdefender Internet Security 2019
5. Add Dropbox from both the real-time and contextual scans
6. Run Full System scan
7. BD still detects and quarantines the above files despite the fact that the entire Dropbox folder has been excluded from scanning
