Yea, but both of your GPUs are Nvidia. I have totally the same observation as your measurements (see my UEInsight profile above). Did you compare specifically the RHIT times? They should’ve gone up like crazy between the current 5.4 and 5.3.
This was verified by multiple team members with high-end RTX GPUs.
However, another team member on an AMD wasn’t affected that bad. His UEInsight profile looks as it did before the engine update.
What surprises me the most: This is a thread with more than 20k views and almost 100 replies. Yet it goes seemingly unnoticed, almost ghosted, by Epic.
Acknowledging the issues and signalling that it’s looked into would go a long way in calming the worried devs (including myself).