Please help us with answers to the below queries:
1. OS version of the machine where issue is reproducible.
2.Are the files opened simultaneously by more than one user?
3. Does the same file which is opened as Read Only in Id 14.0.2, when opened in Id 14.0.1 opens fine?
4. Does remounting the SMB drive fixes the issue?
An error occurred while saving the commentMichael commented
I have been seeing this issue since ID 2015, on AFP and SMB shares. Have continued to see it all the way through to ID 2018 and Macs ranging from 10.11 to 10.14.
Open a file, the lock file gets created and then disappears. The file is then opened in a read only state. I have tried a range of fixes including disabling the finder preview icons, not working in column view etc.
It's driving us mad.