How to solve the problem with Yandex disk (DAV)?

Question

*nix-like systems

Debian 10
Problem with Yandex Disk:
1. Create folder /mnt/site
2. Write to /etc/davfs2/secrets
/mnt/site [email protected] pAssWorD
3. Mount yes | mount -t davfs https://webdav.yandex.ru /mnt/site/
4. I look at the files on the disk, everything is
OK 5. I copy the file to the disk, everything is also OK 6. I turn off the
disk and get eternal synchronization:
umount /mnt/ site
/sbin/umount.davfs: waiting while mount.davfs (pid 1249) synchronizes the cache .............. ................................................. ................................................

Before backed up with Debian 9, everything worked, but something doesn’t work with the 10th, although I do the same. Any thoughts?

PS. If I do not copy anything, then I turn off normally. The channel speed is 60Mbps, so a 10Mb file should be synchronized quickly, at least 10 seconds was enough before.

Upd. I killed the process and deleted the pid, I connected and looked at the copied file here:
tree /mnt/site
...
└── lost+found
├── site.ru-2020-02-29.tar.gz-7BjUAw
└── site.ru -2020-02-29.tar.gz-Ieu314

and where I copied it, it is not there

Answer 1

Now it's not. WEBDAV EMNIP was even taken out of the documentation. Up to a heap the other day blocked the alternative client rclone. So if you want normal cloud storage (not necessarily via webdav), change Yandex, but at least to the same mega and use the same rclone. That is, webdav for Yandex somehow works, but you need to use crooked and oblique offs. client, according to Yandex.