ReadyNAS 422 - SMB share and MacOS

ReadyNAS 422 with 6.9.3

Creating SMB share "test-share" (SMB),  adding R/W permissions for "user1" and "user2".

Computer 1 - Win10:               user1 connected to test-share

Computer 2 - MacOS Sierra (the same from newSierra):  user2 connected to test-share

There is a small text file "test.txt" prepared on desktops of both computers.

Now the problem:

1) test.txt is copied to test-share (does not matter from which computer) - everything is OK, file is on test-share and visible

2) User1 from Win10 is deleting test.txt - everything is OK - file disappears on both computers (Explorer on Win10 and Finder on Mac)

3) User2 on Mac is trying to copy test.txt from desktop (prepared file) to test-share - ERROR:

   - message, that file is already there and question, if I want to replace, cancel or keep both

   - If choosing Replace option (just for test), ERROR - Operation cannot be finished - there is already item with the name "" (empty name)

 

It looks SMB protocol on Mac is not correcty updating information from the share.

Another symtoms:

- problem disappears, if test-share is re-mounted on the Mac

- problem disappears, if test.txt is copied back to test-share from Win10, after that it is possible to copy test.txt from Mac desktop to test-share, choosing option "Replace" and everything is OK

 

Terrible, because it is imposible to share files on test-share.

Any suggestions?

Thank you