diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index d81756f647..27bcc1c1fc 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -489,6 +489,17 @@
       <key>Value</key>
       <integer>1</integer>
     </map>
+    <key>RecentJumpThresholdSecs</key>
+    <map>
+      <key>Comment</key>
+      <string>Seconds after a jump input during which finish-anim is suppressed to avoid interrupting rapid successive jumps.</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>F32</string>
+      <key>Value</key>
+      <real>1.0</real>
+    </map>
     <key>AvatarAxisDeadZone0</key>
     <map>
       <key>Comment</key>
diff --git a/indra/newview/llagent.cpp b/indra/newview/llagent.cpp
index 60af0cad05..e3f9debd2f 100644
--- a/indra/newview/llagent.cpp
+++ b/indra/newview/llagent.cpp
@@ -426,6 +426,7 @@ LLAgent::LLAgent() :
     mIsDoNotDisturb(false),
 
     mControlFlags(0x00000000),
+    mLastJumpInputTime(0.0),
 
     mAutoPilot(false),
     mAutoPilotFlyOnStop(false),
@@ -780,6 +781,10 @@ void LLAgent::moveUp(S32 direction)
 
     if (direction > 0)
     {
+        if (!getFlying())
+        {
+            mLastJumpRequestTime = LLTimer::getTotalSeconds();
+        }
         setControlFlags(AGENT_CONTROL_UP_POS | AGENT_CONTROL_FAST_UP);
     }
     else if (direction < 0)
@@ -2663,7 +2668,21 @@ void LLAgent::onAnimStop(const LLUUID& id)
     }
     else if (id == ANIM_AGENT_PRE_JUMP || id == ANIM_AGENT_LAND || id == ANIM_AGENT_MEDIUM_LAND)
     {
-        setControlFlags(AGENT_CONTROL_FINISH_ANIM);
+        // FIRE-34049/FIRE-34273/https://github.com/secondlife/viewer/issues/4218
+        // Avoid forcing AGENT_CONTROL_FINISH_ANIM, which can short-circuit the next pre-jump
+        // during rapid successive jumps.
+        // TODO: a more robust fix would require knowing which specific animation finished,
+        // information that is not currently provided by the simulator.
+        const bool up_pos = (mControlFlags & AGENT_CONTROL_UP_POS) != 0;
+        const F64 now = LLTimer::getTotalSeconds();
+        const F64 elapsed = now - mLastJumpInputTime;
+        static LLCachedControl<F32> recent_jump_threshold_secs(gSavedSettings, "RecentJumpThresholdSecs");
+        const bool recent_jump = (mLastJumpInputTime > 0.0) && (elapsed < recent_jump_threshold_secs);
+
+        if (!up_pos && !recent_jump)
+        {
+            setControlFlags(AGENT_CONTROL_FINISH_ANIM);
+        }
     }
 }
 
diff --git a/indra/newview/llagent.h b/indra/newview/llagent.h
index 3352890d99..e6d9623957 100644
--- a/indra/newview/llagent.h
+++ b/indra/newview/llagent.h
@@ -487,6 +487,7 @@ class LLAgent : public LLOldEvents::LLObservable
     S32             mControlsTakenCount[TOTAL_CONTROLS];
     S32             mControlsTakenPassedOnCount[TOTAL_CONTROLS];
     U32             mControlFlags;                  // Replacement for the mFooKey's
+    F64             mLastJumpInputTime;             // Time of last jump input (key-down) in seconds from LLTimer::getTotalSeconds()
 
     //--------------------------------------------------------------------
     // Animations