Caused by updating each submission object with updated lastSavedAt which is computed for this page.
Fix: Only derive new lastSavedAt value without persisting it. This avoids locking on the submission objects which caused multiple (failing) attempts to render the page by Stale State Object exceptions.

Also: add prefetches for lazy loaded collections used on the page to reduce number of queries by a factor 2.

Submitted by Elmer van Chastelet on 4 November 2022 at 08:20