If you enter the seed from the old duck wallet to new wallet's address recovery, you should get the duck fly to the new wallet.
Discussion
when I did that, it prompted me to restore feudalbleat250 (I hadn't noted what it was before)
When I checked the counters, one mint only had a single counter of 0 while the other had multiple counters with the largest being 23. When I hit the increase index button it said it was increasing by 50, so I assume that was sufficient.
Yes
I checked the address server and see the issue. You had really old wallet from before seed recovery of addresses was born.
I'll coordinate the fix over DM.