i haven’t seen this answered yet. Some of us saved quest rewards - didn’t collect them when earned - to save for that little extra bit needed to cover a cost - whether it was gems, gold or grog. Those saved rewards all disappeared with the latest update, though I see that in-progress ones are still there, just with chests as rewards now. Did the finished quest rewards simply get replaced by chests, same as the unfinished ones? @Lynsey [Midoki] I remember having some ready-to-claim chests after the update...
All of mine did, yes! (fortunately for me, my completed uncollected ones were only grog/gold - I only 'lost' gems on the incomplete ones).