TrueNAS 25.10.0 showing empty folder through SMB share

Hello. I’ve upgraded from TrueNAS 25.04.2.6 to 25.10.0. First by upgrading through the web UI, after that by doing a clean install, importing my pool and manually setting back my settings. In both cases, FreeFileSync would think the SMB share is empty. When I click to open text files in the share, Windows 11 Explorer would sometimes also start saying the share/folder is empty (but the text file would open normally). I can also browse through the data and open files most of the time. Sometimes I would get an error (file/folder not in that location). But when performing a scrub, all the data seems to be there. So it has (luckily) nothing to do with the data itself, just with the SMB software. As far as I know, I have set (and kept) most default settings. The pool is encrypted with a passphrase and I have compression turned off. The system dataset is also on the boot-pool. I have added a dedicated SMB user and a dedicated SMB child dataset. The other settings (including SMB ACL) are the default ones as far as I know.

Any help would be greatly appreciated. I don’t think this bug has been or will be reported by others, because it is too serious.

It’s most likely the same bug as this, or at least related to it. The subject also has a comment with a potential fix you could try

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Same issue here, it’s quite random. Needs several refreshes , switch to other disks and come back etc.. to have the root folders displayed. Quite annoying. Never did that with 25.04.

Correct and if you revert the problem will go away.

I have similar issues, files missing, corrupted folder names. Reverted back to 25.04 and everything works fine.

I am also getting this issue, sometimes folders show up as empty and also when writing to an SMB share the speed will sometimes drop to 0 for it to recover many minutes later