In my opinion, the part of the header that let you switch between vaults should not be sticky. It unnecessarily takes up a lot of vertical real estate, and I believe there is a significant amount of individuals like me who rarely use the feature. Most of the time I want to show all vaults, and I probably want to filter by vaults only 1 out of a 1000 times.
Otherwise, the app is already a great improvement.
Keep up the good work!