MAX transfer to spending causes insufficient error

[piotr-iohk]

What happened?

Transferring to spending MAX amount causes "Insufficient funds" error.
As being fixed in iOS: synonymdev/bitkit-ios#416

Steps to Reproduce

1. Have on-chain balance (e.g., 5000 sats)
2. Go to Transfer > To Spending
3. Press MAX button
4. Tap Continue - amounts should add up correctly on confirm screen
5. Swipe to transfer - should succeed without "Insufficient funds" error

Logs / Screenshots / Recordings

Screen.Recording.2026-01-29.at.10.08.08.mov

logs.zip

Environment

Bitkit 175, regtest