<!-- Describe the issue -->

When our chainstate activation sequence fails and we're running the GUI, we ask the user via a question box whether or not they'd like to re-run the sequence with `fReindex = true`. Fun fact: despite the fact that this sequence is wrapped in a while loop, we only run it twice at most.

https://github.com/bitcoin/bitcoin/blob/7ecb309c4ed1bb9ae6b9a12cbb4f083328edc125/src/init.cpp#L1539-L1556

If they answer yes, the sequence will always fail, because a chainstate will have already been initialized in the original run and `InitializeChainstate` will throw a `std::logic_error`:

https://github.com/bitcoin/bitcoin/blob/7ecb309c4ed1bb9ae6b9a12cbb4f083328edc125/src/validation.cpp#L4573-L4594

This always reproduces. To reproduce:
```
gdb ./src/qt/bitcoin-qt
(gdb) b InitializeChainstate
(gdb) # add breakpoint for the "if (!fLoaded && !ShutdownRequested()) {" line
(gdb) r  # should stop at the breakpoint for InitializeChainstate
(gdb) c  # to advance to the breakpoint for the "if (!fLoaded && !ShutdownRequested()) {" line
(gdb) set fLoaded=false
(gdb) c  # should stop at the breakpoint for InitializeChainstate
(gdb) n  # step through InitializeChainstate to see that it throws
```

We expect the re-run of the chainstate activation sequence to not always fail.

{
    AssertLocHeld(::cs_main);
    assert(m_coins_views != nullptr);
    m_coinstip_cache_size_byt = cache_size_byt;
    m_coins_views->InitCache();
}
bool CChainState::IsInitialBlocDownload() const
{
    
    if (m_cached_finished_ibd.load(std::memory_order_relaxed))
        retn false;
    LOCK(cs_main);
    if (m_cached_finished_ibd.load(std::memory_order_relaxed))
        retn false;
    if (fImporting || fReiex)
        retn true;
    if (m_chain.Tip() == nullptr)
        retn true;
    if (m_chain.Tip()->nChainWor < nMinimumChainWor)
        retn true;
    if (m_chain.Tip()->GetBlocTime() < (GetTime() - nMaxTipAge))
        retn true;
    LogPrintf("Leaving InitialBlocDownload (latching to false)\n");
    m_cached_finished_ibd.store(true, std::memory_order_relaxed);
    retn false;
}
static void AlertNotify(const std::string& strMsage)
{
    uiInterface.NotifyAlertChanged();