Dimensions - Changing structure of translated Content-Nodes causes them to disappear

Description

After moving a Neos.Demo:Content.Columns.Two (with translated Neos.Demo:Content.Text in its columns) into the column of another Neos.Demo:Content.Columns.Two (in the main/fallback-dimension) the Neos.Demo:Content.Text-nodes disappear in the frontend ( in the other dimension). Tested using the demo-site with minimal changes.

Steps to Reproduce

Preparation

Changing the constraints of NodeTypes.Collection.Content.Column.yaml to enable testing with minimal demo-setup:

constraints:
    nodeTypes:
      '*': true

Changing the Dimensions in Settings.yaml to:

contentDimensions:
      language:
        label: 'Language'
        icon: 'icon-language'
        default: de
        defaultPreset: de
        presets:
          de:
            label: 'DE'
            values: [ 'de' ]
            uriSegment: ''
          en:
            label: 'EN'
            values: [ 'en', 'de' ]
            uriSegment: 'en'

(and then ./flow node:migrate 20150716212459, cache:flush, etc...)

Steps

1. Create new Page called Test in language de
2. create a Neos.Demo:Content.Columns.Two in main 2.1. put Neos.Demo:Content.Text in column0 with text de text 1 2.2 put Neos.Demo:Content.Text in column1 with text de text 2
3. publish all changes to live
4. switch language to 'en'
5. translate texts to en text 1 and en text 2
6. publish all changes to live
7. switch language back to 'de'
8. create a second Neos.Demo:Content.Columns.Two in main
9. put the first Neos.Demo:Content.Columns.Two in column0 of the second Neos.Demo:Content.Columns.Two
10. publish all changes to live
11. open the page in the frontend
12. switching language to 'en'

Expected behavior

The page should look like it does in the backend, with all nodes visible.

Actual behavior

The two Neos.Demo:Content.Text nodes are not rendered. The two Neos.Demo:Content.Columns.Two are rendered, though.

Affected Versions

Neos: 5.3, 7.1