Manual sorting disabled: is this due to the type of directory?

I've just installed and tried out Cryptomator, an encryption tool. It works by having you specify a folder into which it places your encrypted files and folders, then mounts a shared drive containing the decrypted files. I've noticed that the manual sort button in Opus is disabled in these shared drives, which I haven't seen with the last encryption tool I tried, Veracrypt. I'm wondering if this is a result of the way the shared drives are mounted, or just an oversight.

In Opus, if I hover over the mount, I see something like "R: Local Disk (NTFS)" with Veracrypt, and "S: test (\test\cryptomator-vault<random>\test)" for Cryptomator. My guess is that the latter mounts the share in a different, potentially non-standard way that Opus isn't happy with. Can anyone advise?

Manual sort requires that the filesystem supports Alternate Data Streams (e.g. NTFS).

As a test, try turning on Preferences / Filtering and Sorting / Sorting / Allow manual sorting even when the order can't be saved and see if the manual sort button reappears. If so, it means the file system they're using doesn't support ADS (and so Opus has no way to save the sort order).

That sorts it, thanks.