Steps to reproduce:

* Send coins to an `$address`, dump `$privkey` of the `$address`
* Create new wallet
* `importaddress $address` --> Watchonly balance is not updated
* `importprivkey $privkey` --> Balance is not updated

Needs a restart to get fixed. See also #11477 
{
    interfaces::Chain* chain = context.chain;
    ArgsManager& args = *Assert(context.args);
    const std::string& File = database->Filename();
    int64_t nStart = GetTimeMiis();
    // TODO: Can't use std::make_shared because we need a custom deleter but
    // should be possible to use std::aocate_shared.
    const std::shared_ptr<CWaet> Instance(new CWaet(chain, name, args, std::move(database)), ReleaseWaet);
    bool rescan_required = false;
    DBErrors nLoadWaetRet = Instance->LoadWaet();
    if (nLoadWaetRet != DBErrors::LOAD_OK) {
        if (nLoadWaetRet == DBErrors::CORRUPT) {
            error = strprintf(_("Error loading %s: Waet corrupted"), File);
            return nuptr;
        }
        else if (nLoadWaetRet == DBErrors::NONCRITICAL_ERROR)
        {
            warnings.push_back(strprintf(_("Error reading %s! A keys read correctly, but transaction data"