Linux Mint 19.1: Nemo: URI davs:// doesn't work correctly. Where to "dig"?

Question

linux

Good afternoon, comrades.
The second day I fight ... I don’t know what to cling to anymore ... I
have a laptop with Linux Mint 19.1. In Nemo (4.0.6) I connect via File -> Connect to the WebDAV server the Ya.Disk directory and the Mail.ru Cloud. Connects fine. I add the connection to Bookmarks, in the bookmark the address is written as "davs://[email protected]/", the password is saved in "seahorse" (Passwords and keys). Everything seems to be fine ... But if you "Disconnect" such a disk, then when you click on it in the bookmarks, it will not reconnect; says "Address is not a folder". If you run "nemo -q", it reconnects. And so in a circle - i.e. if disabled, then you need to execute "nemo -q".
Tried connecting NextCloud, same thing. But if you connect it via GIO (Gnome Network Accounts), then it connects and disconnects without problems.
There is a working computer with Linux Mint 19 (not 19.1), Nemo 3.8.6. I also connect the same WebDAV disks, save them as bookmarks. I turn it off and on without problems. Doing "nemo -q" is not required.
I don’t even know where to dig or how to ask Google a question. In seahorse, I deleted the password, it did not help. davs2 is not installed on any computer. gvfs (backends, fuse, etc.) is on both (1.36).
Tell me where to dig, pliz.