Showing a list of OTL expressions does not render the deeper substitution changes that may exist. A LL might provide more help. Or even a nested structure which would list the OTs just before the Label Types come into play.

Instead of overcomplicating the UX, a simple double click options is added for the list of presented expression. This will open the relevant expression tree to see the full context.

Closing automatically, stayed too long in resolved state. Feel free to re-open with additional information if you think the issue is not resolved.