Mention that other RPC calls report keys as "imported" while txns are still missing

src/wallet/rpcdump.cpp

@@ -86,7 +86,8 @@ UniValue importprivkey(const JSONRPCRequest& request)
             "1. \"privkey\"          (string, required) The private key (see dumpprivkey)\n"
             "2. \"label\"            (string, optional, default=\"\") An optional label\n"
             "3. rescan               (boolean, optional, default=true) Rescan the wallet for transactions\n"
-            "\nNote: This call can take minutes to complete if rescan is true.\n"
+            "\nNote: This call can take minutes to complete if rescan is true, during that time, other rpc calls\n"
+            "may report that the imported key exists but related transactions are still missing, leading to temporarily incorrect/bogus balances and unspent outputs until rescan completes.\n"
             "\nExamples:\n"
             "\nDump a private key\n"
             + HelpExampleCli("dumpprivkey", "\"myaddress\"") +
@@ -241,7 +242,8 @@ UniValue importaddress(const JSONRPCRequest& request)
             "2. \"label\"            (string, optional, default=\"\") An optional label\n"
             "3. rescan               (boolean, optional, default=true) Rescan the wallet for transactions\n"
             "4. p2sh                 (boolean, optional, default=false) Add the P2SH version of the script as well\n"
-            "\nNote: This call can take minutes to complete if rescan is true.\n"
+            "\nNote: This call can take minutes to complete if rescan is true, during that time, other rpc calls\n"
+            "may report that the imported address exists but related transactions are still missing, leading to temporarily incorrect/bogus balances and unspent outputs until rescan completes.\n"
             "If you have the full public key, you should call importpubkey instead of this.\n"
             "\nNote: If you import a non-standard raw script in hex form, outputs sending to it will be treated\n"
             "as change, and not show up in many RPCs.\n"
@@ -416,7 +418,8 @@ UniValue importpubkey(const JSONRPCRequest& request)
             "1. \"pubkey\"           (string, required) The hex-encoded public key\n"
             "2. \"label\"            (string, optional, default=\"\") An optional label\n"
             "3. rescan               (boolean, optional, default=true) Rescan the wallet for transactions\n"
-            "\nNote: This call can take minutes to complete if rescan is true.\n"
+            "\nNote: This call can take minutes to complete if rescan is true, during that time, other rpc calls\n"
+            "may report that the imported pubkey exists but related transactions are still missing, leading to temporarily incorrect/bogus balances and unspent outputs until rescan completes.\n"
             "\nExamples:\n"
             "\nImport a public key with rescan\n"
             + HelpExampleCli("importpubkey", "\"mypubkey\"") +
@@ -1133,6 +1136,8 @@ UniValue importmulti(const JSONRPCRequest& mainRequest)
             "  {\n"
             "     \"rescan\": <false>,         (boolean, optional, default: true) Stating if should rescan the blockchain after all imports\n"
             "  }\n"
+            "\nNote: This call can take minutes to complete if rescan is true, during that time, other rpc calls\n"
+            "may report that the imported keys, addresses or scripts exists but related transactions are still missing.\n"
             "\nExamples:\n" +
             HelpExampleCli("importmulti", "'[{ \"scriptPubKey\": { \"address\": \"<my address>\" }, \"timestamp\":1455191478 }, "
                                           "{ \"scriptPubKey\": { \"address\": \"<my 2nd address>\" }, \"label\": \"example 2\", \"timestamp\": 1455191480 }]'") +