Problems in TrustWallet and libbitcoin bx are similar - bad random number generation.
I guessed either this or nonce reuse in ECDSA.
https://milksad.info/disclosure.html#part-i---tracing-the-issue-to-the-source
Discussion
What's the nuclear option for avoiding this? Dice rolls?
Dice rolls are random enough:
didn't know about this issue, is there something major, would check more on this