I seem to be getting a few surveys wherebye I'm advised I have successfully completed the survey but invite me to to answer a few more questions for additional credit. Perhaps this is a direct result of my continuously closing out of those screens that are "answer a few questions to find a survey" or those that look like I won't even get a partial credit for answering any questions.

As a data point - redeemed Monday 21st Jan., "Experiencing Processing Delays" in the ERewards Redemption history; points appeared in my transaction details of the Hilton Account 24th/yesterday but are not yet included in the Hilton points total amount (the app or desktop access).

Update: Points total updated 26th. So, from ERewards redemption through to correct Hilton tally just 6 days😀👍