XnViewMP 0.93.1 - Rebuild thumbnail function scan *.rar files

[masterjp]

Today I want to rebuild my whole thumbnail database with the function in settings menu.
I pressed the rebuild button and XnViewMP scanned my directories.

The XnViewMP thumbnail rebuilder scanned a *.rar file with 700 MB and it took much time!!!
Why XnViewMP scans a compressed file, if it will not show the content ?
It is not useful and cost much time.

[xnview]

i can't reproduce, could you send me a .rar file?

[masterjp]

I delete the whole thumbnail database and rebuild it again.
I could not reproduce the problem. Maybe something else stopped the scanning process.