Hello
Im having the same issue on linux.
ls -s, du -s report 0.
But ls -l does report the expected size.
I tried with gocryptfs and encfs and they report the correct sizes (ls and du). They present a completely normal mount to the system, meanwhile cryptomator presents some ‘magic’ files of 0 size (just like those in /proc/).
This behaviour breaks compatibility with scripts and other applications which rely on querying file sizes.