we are using Collabora Online installed from the official package repos.
Installed version of package loolwsd: 3.4.0-8
It seems like whenever Collabora Online does a conversion, for example when exporting to PDF or opening .docx files LOOLWSD puts these temporary files into /tmp/convert-to. But it never cleans them up. This means that the filesystem where /tmp resides gets filled up over time. For /var/cache/loolwsd the loolwsd package brings a cronjob (in /etc/cron.d/loolwsd) to remove files after a certain period, but there is no such cronjob for /tmp/convert-to.
Can anyone confirm this behavior? Was this also the case for earlier versions?