Readynas 104 regularly locks up after upgrading to 6.4.0

Hello,

Since a few months my RN104 was super stable, I did not have it stuck like in the beginnings of Readynas OS 6. I was super happy with it!

But since a few days I upgraded to version 6.4.0 and the Nas seems to be stuck when I launch heavy processes on the disk.

It already happened twice in the last 4 days.

Everytime it happened when I launched a big donload (more than 2Gb) on the transmission add-on.

with smaller files it did not cause the issue.

Needless to say this was not the case before version 6.4.0.

I did not see any connection with the snapshot functionality since it happened on a "not snapshoted" share and at very different times of the day.

My Nas is only 55% full so it is not caused by a full disk issue.

The Antivirus is also disabled.

I will try to uninstall then reinstall transmission but it seems more likely to be caused by the OS itself.

Does anyone of you have a solution?

Or know how to report that to the dev team?

Thanks in advance