While working on a robust randomized test for SOLR-9285, I can't seem to get filter queries on RTG to work at all – even when the docs are fully committed.
steps to reproduce to follow in comment...
SolrCloud RTG: psuedo-fields (like ValueSourceAugmenter, [shard], etc...) silently fails (even for committed doc)
SolrCloud RTG: fl=[docid] silently ignored for all docs
need better cloud & RTG testing of TestPseudoReturnFields