I got a 441 Curio and this is the answer I got. looks like we are just boned.
"Thanks for contacting us about mistakenly receiving a reward with the wrong item level, or a Fobidden Flounder, or a Flame-warped Curio, from new Season 4 activities that rewarded a Cache of Awakened Treasures.
I understand it’s frustrating when in-game activities don’t work as intended and I am sorry you were affected by an issue like this. Sadly, Customer Support cannot assist with replacing a random item of the wrong item level and so requests of this nature cannot be fulfilled. Any eligible cases that could be resolved by our development team have now been resolved by them: Opened timewalking Cache before hotfix - #31 by Kaivax
If you did not receive a replacement cache, then unfortunately it was not possible to resolve the issue in your case.
Thanks again for bringing this to our attention, and our apologies for any inconvenience caused."