diff --git a/app/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt b/app/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt
index 604ff6338..bd673fb1e 100644
--- a/app/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt
+++ b/app/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt
@@ -1018,7 +1018,14 @@ object LocalCache {
     fun consume(event: Event, relay: Relay?) {
         checkNotInMainThread()
 
-        if (!event.hasValidSignature()) return
+        if (!event.hasValidSignature()) {
+            try {
+                event.checkSignature()
+            } catch (e: Exception) {
+                Log.w("Event failed retest ${event.kind}", e.message ?: "")
+            }
+            return
+        }
 
         try {
             when (event) {
diff --git a/app/src/main/java/com/vitorpamplona/amethyst/service/model/Event.kt b/app/src/main/java/com/vitorpamplona/amethyst/service/model/Event.kt
index 68e206631..c3681b737 100644
--- a/app/src/main/java/com/vitorpamplona/amethyst/service/model/Event.kt
+++ b/app/src/main/java/com/vitorpamplona/amethyst/service/model/Event.kt
@@ -138,7 +138,7 @@ open class Event(
             .replace("\\u2028", "\u2028")
             .replace("\\u2029", "\u2029")
 
-        return sha256.digest(rawEventJson.toByteArray()).toHexKey()
+        return MessageDigest.getInstance("SHA-256").digest(rawEventJson.toByteArray()).toHexKey()
     }
 
     private class EventDeserializer : JsonDeserializer<Event> {
@@ -212,7 +212,6 @@ open class Event(
     companion object {
         private val secp256k1 = Secp256k1.get()
 
-        val sha256: MessageDigest = MessageDigest.getInstance("SHA-256")
         val gson: Gson = GsonBuilder()
             .disableHtmlEscaping()
             .registerTypeAdapter(Event::class.java, EventSerializer())
@@ -283,7 +282,7 @@ open class Event(
                 .replace("\\u2028", "\u2028")
                 .replace("\\u2029", "\u2029")
 
-            return sha256.digest(rawEventJson.toByteArray())
+            return MessageDigest.getInstance("SHA-256").digest(rawEventJson.toByteArray())
         }
 
         fun create(privateKey: ByteArray, kind: Int, tags: List<List<String>> = emptyList(), content: String = "", createdAt: Long = Date().time / 1000): Event {
diff --git a/app/src/main/java/com/vitorpamplona/amethyst/service/model/LnZapRequestEvent.kt b/app/src/main/java/com/vitorpamplona/amethyst/service/model/LnZapRequestEvent.kt
index aa60dcb6f..bdb77b3d4 100644
--- a/app/src/main/java/com/vitorpamplona/amethyst/service/model/LnZapRequestEvent.kt
+++ b/app/src/main/java/com/vitorpamplona/amethyst/service/model/LnZapRequestEvent.kt
@@ -5,6 +5,7 @@ import com.vitorpamplona.amethyst.model.*
 import nostr.postr.Bech32
 import nostr.postr.Utils
 import java.nio.charset.Charset
+import java.security.MessageDigest
 import java.security.SecureRandom
 import java.util.*
 import javax.crypto.BadPaddingException
@@ -133,7 +134,7 @@ class LnZapRequestEvent(
         fun createEncryptionPrivateKey(privkey: String, id: String, createdAt: Long): ByteArray {
             var str = privkey + id + createdAt.toString()
             var strbyte = str.toByteArray(Charset.forName("utf-8"))
-            return sha256.digest(strbyte)
+            return MessageDigest.getInstance("SHA-256").digest(strbyte)
         }
 
         private fun encryptPrivateZapMessage(msg: String, privkey: ByteArray, pubkey: ByteArray): String {
diff --git a/app/src/main/java/com/vitorpamplona/amethyst/ui/components/Robohash.kt b/app/src/main/java/com/vitorpamplona/amethyst/ui/components/Robohash.kt
index eae25438e..298fa68b1 100644
--- a/app/src/main/java/com/vitorpamplona/amethyst/ui/components/Robohash.kt
+++ b/app/src/main/java/com/vitorpamplona/amethyst/ui/components/Robohash.kt
@@ -22,8 +22,6 @@ private fun toHex(color: Color): String {
     return String.format("#%06X", rgb)
 }
 
-private val sha256: MessageDigest = MessageDigest.getInstance("SHA-256")
-
 private fun byteMod10(byte: Byte): Int {
     val ub = byte.toUByte().toInt()
     return ub % 10
@@ -34,7 +32,7 @@ private fun bytesToRGB(b1: Byte, b2: Byte, b3: Byte): Color {
 }
 
 private fun svgString(msg: String): String {
-    val hash = sha256.digest(msg.toByteArray())
+    val hash = MessageDigest.getInstance("SHA-256").digest(msg.toByteArray())
     val hashHex = hash.joinToString(separator = "") { b -> "%02x".format(b) }
     val bgColor = bytesToRGB(hash[0], hash[1], hash[2])
     val fgColor = bytesToRGB(hash[3], hash[4], hash[5])