19.0 workspaces saved with an active link do not have the link restored when you load the workspace

[dyavc]

Describe the bug
If I save a workspace with an active link, the link does not survive if I reload the workspace
This is reported by a user upgrading from 18.2 to 19.0.

To Reproduce
]link.create # d:\temp\linktest2
)save d:\tmp\mywslink
)off

Start dyalog 19.0
)load d:\tmp\mywslink
]link.status
No active links

Expected behaviour
Expect it work as it does in 18.2 and Link 3.0.

 in 18.2,
 Link Warning: 1 link restored: #
       ]link.status
  Namespace  Directory          Files 
  #          d:/temp/linktest2     21 
       ]link.resync
 No action required
 

Desktop (please complete the following information):
]tools.version
Dyalog 19.0.49395 64-bit Unicode, BuildID 7fe061c5
OS Windows 10 or Windows Server 2016 (10.0.19045) 64-bit
Link 4.0.17
SALT 2.915

Additional context
19.0 also does not restore links in workspaces saved by 18.2.

The 18.2 version used is:
]tools.version
Dyalog 18.2.49395 64-bit Unicode, BuildID 57712695
OS Windows 10 or Windows Server 2016 (10.0.19045) 64-bit
Link 3.0.19
SALT 2.9
UCMD 2.51