Textual editors sometimes break ecore object references

From time to time, when editing using the textual repository or usageprofile editor, the XText editor appears to "lose" object references when saving as ecore model instance.

For instance, instead of saving a reference in ecore similar to

<resourceType xsi:type="resourcetype:ProcessingResourceType" href="fixture.resourcetype#_wb33sEibEeOUHduTkzq26A"/>

the resulting ecore file contains broken references that look like

<resourceType xsi:type="resourcetype:ProcessingResourceType" href="xtextLink_:://......"/>

Unfortunately, this error is hard to reproduce. Example model instances should be provided.