ID 360376 - Cyclic text when assigning a user channel to the same Channel Handle it was created on.

Problem summary
Creating a user channel on a channel handle and then referencing the same user channel on that channel handle causes a text loop.

Customer reported version
modo.12.1v1

Customer reported platform
windows10

Steps to reproduce

1) In the Item List, create a Channel Handle.

2) Select the Channel Handle, then in the Properties menu switch to the User Channels tab.

3) Click "Add User Channel", then enter a name in the Username field and click OK.

4) Right-click the newly created user channel and assign it to the existing Channel Handle item again via Assign Handle... and setting the Channel Handle to the Handle Item. A text loop will occur, and the name of the user channel will be printed across the screen. The text for the Channel Handle in the Item List will also be affected.

Reproduced by support

This bug has been reproduced in:

Windows 10
12.1v2
12.0v1
11.2v3
11.1v1
11.0v3
10.2v4

macOS
12.1v2
10.2v4

Earliest version tested
10.2v4 - This issue appears to be in all versions of the product

Expected behaviour
The text should not loop.

Actual behaviour
Text loops across the 3D Viewport and in the Item List.