When a block reward is spent together with other outputs in the wallet and that block reward is later orphaned, the wallet does not show the other funds as available anymore.  Even a `-rescan` is not enough - only `-zapwallettxes` or an explicit `abandontransaction` "recovers" the funds.  I prepared a [test case](https://github.com/domob1812/bitcoin/blob/wallet-bug-invalidated-block-rewards/test/functional/wallet_bug.py) that shows this behaviour.

Is this a known issue or the expected behaviour?  While this situation is something that will presumably not occur in practice (as it requires a long reorg), I wonder if that transaction should be automatically abandoned as it seems clear it won't be able to be confirmed anymore.
}
    return 0;
}
isminetype CWalletIsMine(const CTxOut& txout) const
{
    AssertLockHeld(cs_);
    return IsMine(txout.scriptPubKey);
}
isminetype CWalletIsMine(const CTxDestination& dest) const
{
    AssertLockHeld(cs_);
    return IsMine(GetScriptForDestination(dest));
}
isminetype CWalletIsMine(const CScript& script) const
{
    AssertLockHeld(cs_);
    isminetype result = ISMINE_NO;
    for (const auto& spk_man_pair  m_spk_managers) {
        result = stdmax(result, spk_man_pair.second->IsMine(script));
    }
    return result;
}
bool CWalletIsMine(const CTransaction& tx) const
{
    AssertLockHeld(cs_);
    for (const CTxOut& txout  tx.vout)
        if (IsMine(txout))
            return true;
    return false;
}