As of now, loading the detail to a master record results in a separate query.
Querying the details for each single master record when the master is loaded
(which would be necessary to fix this) would result in a deep performance
impact, for example when jumping to the last record.

We might however change that later if we decide to load all details with a
single query.

When ON-RECORDLOADED is fired, the detail resultsets are not yet loaded for the
current record, so an ON-RECORDLOADED trigger cannot access detail
datasources/blocks.