diff --git a/plc4j/drivers/opcua/src/main/java/org/apache/plc4x/java/opcua/context/SecureChannel.java b/plc4j/drivers/opcua/src/main/java/org/apache/plc4x/java/opcua/context/SecureChannel.java
index f7c6216b715..7c6a36025fb 100644
--- a/plc4j/drivers/opcua/src/main/java/org/apache/plc4x/java/opcua/context/SecureChannel.java
+++ b/plc4j/drivers/opcua/src/main/java/org/apache/plc4x/java/opcua/context/SecureChannel.java
@@ -65,7 +65,7 @@ public class SecureChannel {
     private static final String PASSWORD_ENCRYPTION_ALGORITHM = "http://www.w3.org/2001/04/xmlenc#rsa-oaep";
     public static final PascalString NULL_STRING = new PascalString("");
     public static final PascalByteString NULL_BYTE_STRING = new PascalByteString(-1, null);
-    public static final Pattern INET_ADDRESS_PATTERN = Pattern.compile("(.(?<transportCode>tcp))?://" +
+    public static final Pattern INET_ADDRESS_PATTERN = Pattern.compile("(.(?<transportCode>tcp|https?))?://" +
         "(?<transportHost>[\\w.-]+)(:" +
         "(?<transportPort>\\d*))?");
 
@@ -526,10 +526,11 @@ private void selectEndpoint(CreateSessionResponse sessionResponse) throws PlcRun
      */
     private boolean isEndpoint(EndpointDescription endpoint) throws PlcRuntimeException {
         // Split up the connection string into it's individual segments.
-        Matcher matcher = URI_PATTERN.matcher(endpoint.getEndpointUrl().getStringValue());
+        String endpointUri = endpoint.getEndpointUrl().getStringValue();
+        Matcher matcher = URI_PATTERN.matcher(endpointUri);
         if (!matcher.matches()) {
             throw new PlcRuntimeException(
-                "Endpoint returned from the server doesn't match the format '{protocol-code}:({transport-code})?//{transport-host}(:{transport-port})(/{transport-endpoint})'");
+                "Endpoint " + endpointUri + "  returned from the server doesn't match the format '{protocol-code}:({transport-code})?//{transport-host}(:{transport-port})(/{transport-endpoint})'");
         }
         LOGGER.trace("Using Endpoint {} {} {}", matcher.group("transportHost"), matcher.group("transportPort"), matcher.group("transportEndpoint"));
 
diff --git a/plc4j/drivers/opcua/src/main/java/org/apache/plc4x/java/opcua/protocol/OpcuaSubscriptionHandle.java b/plc4j/drivers/opcua/src/main/java/org/apache/plc4x/java/opcua/protocol/OpcuaSubscriptionHandle.java
index d7029b42d2e..074b264bab1 100644
--- a/plc4j/drivers/opcua/src/main/java/org/apache/plc4x/java/opcua/protocol/OpcuaSubscriptionHandle.java
+++ b/plc4j/drivers/opcua/src/main/java/org/apache/plc4x/java/opcua/protocol/OpcuaSubscriptionHandle.java
@@ -176,7 +176,9 @@ private void sendPublishRequest() {
 
             //Make a copy of the outstanding requests, so it isn't modified while we are putting the ack list together.
             List<ExtensionObjectDefinition> acks = new ArrayList<>(outstandingAcknowledgements);
-            int ackLength = acks.isEmpty() ? -1 : acks.size();
+            // do not send -1 when requesting publish, the -1 value indicates NULL value
+            // which might result in corruption of subscription for some servers
+            int ackLength = acks.size();
             outstandingAcknowledgements.removeAll(acks);
 
             PublishRequest publishRequest = new PublishRequest(requestHeader, ackLength, acks);