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 
#include <wallet/wallet.h>
#include <future>
#include <memory>
#include <stdint.h>
#include <vector>
#include <interfaces/chain.h>
#include <key_io.h>
#include <node/blockstorage.h>
#include <policy/policy.h>
#include <rpc/server.h>
#include <test/util/logging.h>
#include <test/util/setup_common.h>
#include <util/translation.h>
#include <validation.h>
#include <wallet/coincontrol.h>
#include <wallet/context.h>
#include <wallet/receive.h>