diff --git a/src/index.ts b/src/index.ts
index fc3a701c..efa84fa5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -5,11 +5,30 @@
 const _origConsoleError = console.error
 const _origConsoleLog = console.log
 const _origConsoleInfo = console.info
+const _origConsoleWarn = console.warn
+
+// Suppress libsignal session lifecycle dumps from console.log / console.info / console.warn.
+// libsignal's session_record.js / session_builder.js / session_cipher.js use:
+//   console.info("Removing old closed session:", obj)        ← ~500ms I/O dump per call
+//   console.info("Opening session:", obj)                    ← ~500ms I/O dump per call
+//   console.info("Migrating session to:", v)                 ← per migration
+//   console.log("Closing session:", obj)                     ← ~500ms I/O dump per call
+//   console.warn("Closing open session in favor of incoming prekey bundle")  ← per pkmsg
+//   console.warn("Session already closed", obj)              ← per stale close
+//   console.warn("Decrypted message with closed session.")   ← per recovered decrypt
+//   console.warn("Unhandled bucket type (for naming):", ...) ← queue_job edge case
+//
+// Under WhatsApp's LID/DSM rollout these fire dozens of times per minute when
+// the auth state has legacy `_1.0` sessions that don't match LID-addressed
+// envelopes. Each dump is a synchronous stdout.write — pm2 buffers fill and
+// the event loop blocks. Symptom: 60s inbound delivery latency, profile
+// pictures don't load, queries time out.
+//
+// The clean operator-facing signal lives in the console.error interceptor
+// below (formats Bad MAC / Counter / Decryption Failed as one emoji line).
+const _SESSION_LIFECYCLE_RE =
+	/^(Closing session|Removing old closed session|Opening session|Migrating session|Closing open session|Session already closed|Decrypted message with closed session|Unhandled bucket type)/
 
-// Suppress libsignal session lifecycle dumps from console.log / console.info.
-// libsignal's session_record.js uses console.info("Removing old closed session:", obj)
-// and console.log("Closing session:", obj) which dump full session objects (~500ms I/O each).
-const _SESSION_LIFECYCLE_RE = /^(Closing session|Removing old closed session)/
 console.log = function (...args: unknown[]) {
 	if (args.length > 0 && typeof args[0] === 'string' && _SESSION_LIFECYCLE_RE.test(args[0])) {
 		return
@@ -26,6 +45,14 @@ console.info = function (...args: unknown[]) {
 	_origConsoleInfo.apply(console, args)
 }
 
+console.warn = function (...args: unknown[]) {
+	if (args.length > 0 && typeof args[0] === 'string' && _SESSION_LIFECYCLE_RE.test(args[0])) {
+		return
+	}
+
+	_origConsoleWarn.apply(console, args)
+}
+
 // Track errors by type + JID to avoid duplicates (using Map for better performance)
 const _errorTimestamps = new Map<string, number>()
 // Dedup window for repeated decrypt-error console lines (Bad MAC / Counter / etc).