Switching to 'Don't use machine translation' or 'Use source text' results in the translation paragraph being deleted and becoming unusable (it is not possible to select it to type, or switch to a different approach from the MT card).
The animation bellow shows the issue when translating "Lemonade" from English to Spanish and switching to 'Use source text' in CX2 testing servers:
{F23535026, size=full}
A similar issue happens when switching to 'Don't use machine translation'. Steps to reproduce:
1. On CX2 start a translation to English or from English.
2. The default setting is 'User source text' - translate one paragraph and then change setting to 'Don't use machine translation' .
The Console will display:
```
Uncaught TypeError: Cannot read property 'getModel' of undefined
at VeInitMwCXTarget.ve.init.mw.CXTarget.getTargetSectionNode
at VeUiCXTranslationAction.
```
An additional example of the error will be translating 'Rudra' from español to català.