diff --git a/clj-e2e/src/logseq/e2e/graph.clj b/clj-e2e/src/logseq/e2e/graph.clj
index 407d6a9bd8..b4128e1786 100644
--- a/clj-e2e/src/logseq/e2e/graph.clj
+++ b/clj-e2e/src/logseq/e2e/graph.clj
@@ -18,6 +18,7 @@
 
 (defn- input-e2ee-password
   []
+  (w/wait-for "input[type=\"password\"]" {:timeout 20000})
   (w/click "input[type=\"password\"]")
   (util/input "e2etest")
   (w/click "button:text(\"Submit\")"))
diff --git a/clj-e2e/src/logseq/e2e/rtc.clj b/clj-e2e/src/logseq/e2e/rtc.clj
index d910c71f5e..30160eeade 100644
--- a/clj-e2e/src/logseq/e2e/rtc.clj
+++ b/clj-e2e/src/logseq/e2e/rtc.clj
@@ -21,7 +21,7 @@
          _# (prn :current-rtc-tx m# local-tx# remote-tx#)
          tx# (max local-tx# remote-tx#)]
      ~@body
-     (loop [i# 5]
+     (loop [i# 15]
        (when (zero? i#) (throw (ex-info "wait-tx-updated failed" {:old m# :new (get-rtc-tx)})))
        (util/wait-timeout 500)
        (w/wait-for "button.cloud.on.idle" {:timeout 35000})
diff --git a/clj-e2e/test/logseq/e2e/rtc_extra_part2_test.clj b/clj-e2e/test/logseq/e2e/rtc_extra_part2_test.clj
index 0860e8e43a..7b8828e7f1 100644
--- a/clj-e2e/test/logseq/e2e/rtc_extra_part2_test.clj
+++ b/clj-e2e/test/logseq/e2e/rtc_extra_part2_test.clj
@@ -1,5 +1,7 @@
 (ns logseq.e2e.rtc-extra-part2-test
-  (:require [clojure.test :refer [deftest testing is use-fixtures run-test]]
+  (:require [clojure.java.io :as io]
+            [clojure.test :refer [deftest testing is use-fixtures run-test]]
+            [jsonista.core :as json]
             [logseq.e2e.block :as b]
             [logseq.e2e.const :refer [*page1 *page2 *graph-name*]]
             [logseq.e2e.fixtures :as fixtures]
@@ -135,3 +137,18 @@ wait for 5-10 seconds, will found that \"aaa/bbb\" became \"aaa/<encrypted-strin
         (is (some? (.getAttribute (w/-query ".ls-block img") "src"))))
 
       (rtc/validate-graphs-in-2-pw-pages))))
+
+(deftest issue-683-paste-large-block-test
+  (testing "Copying and pasting a large block of text into sync-ed graph causes sync to fail"
+    (let [large-text (slurp (io/resource "large_text.txt"))]
+      (w/with-page @*page1
+        (w/eval-js (str "navigator.clipboard.writeText(" (json/write-value-as-string large-text) ")")))
+      (let [{:keys [remote-tx]}
+            (w/with-page @*page1
+              (rtc/with-wait-tx-updated
+                (b/new-block "")
+                (b/paste)))]
+        (w/with-page @*page2
+          (rtc/wait-tx-update-to remote-tx)))
+
+      (rtc/validate-graphs-in-2-pw-pages))))