This happens EVERY single release of LibreOffice for the last few months (5.0.2 in this case, 64-bit). Can you fix your detection algorithm for this program?
The AV flags soffice.bin as CloudScanner.Trogen.Gen[at]2[at]1 and blocks all access to it.
Version: 8.2.0.4703
Database: 23289
If you manually scan it, it shows up as no problems found, but it stays blocked due to the scanner.
Also, Comodo has also stopped giving the option to ignore the alert – it just shows the dialog that the file has been blocked. It used to ask if you wanted to ignore the finding.
The sample you have submitted <soffice.bin> (SHA:291b6f772948f978055c6f92d9eba40d5e29f65b) as false-positive is not detected by Comodo Internet Security version <8.2.0.4702> with database version <23291>.