Link.Break sometimes crashes with an error

**Describe the bug**
I often use Link.Break to remove all links from an existing NS.
Often times (can't repro reliably) this fails with
* `Command Execution Failed: VALUE ERROR: Undefined name: xxx (a ns below the one I'm intending to Break)`

(_The name xxx is a sub-namespace, and which one is mentioned varies..._)

When running this with ]UDEBUG ON, the error is signaled within Break:
````
VALUE ERROR: Undefined name: API
Init[22] {}⎕SE.Link.Break ⎕SE.CITA
∧
````
However, a simple `→⎕LC` re-executes the line and the problem is gone, so I suspect something just needs to be embedded in a ` :Trap 6`

**Expected behaviour**
Should not error.

**Desktop (please complete the following information):**
Dyalog 18.2.45732 64-bit Unicode, BuildID 45cdfe8a
OS Windows 10 or Windows Server 2016 (10.0.19044) 64-bit
SALT 2.9, Link: 3.0.4
UCMD 2.51
.NET .NET Core 3.1.26
WS 18.2