open62541: unable to receive events after update

Description

At the moment I work on a client that must connect to a server that is running on a robot form another team in our company. This team is writing the server in C++ with the open62541 library. And we are using the .Net library from OpcFoundation.NetStandard 1.4.371.96.

The robot team has updated their library to the newest version because they need it for the HMI of the robot system. After this update the events are not working anymore. Before the update everything was working. open62541 v1.2.2 (events are working) open62541 v1.3.6 (not working)

I need to figure out how I can change the client in such a way that I can receive the events again.

Is someone familiar with this issue? Can someone think of some possible hints that are use full? are there any changed made in the event system?

regards Patrick

Background Information / Reproduction Steps

UAExpert still receives the events from the server after the update.

If I create a plc (B&R) that fire opcua events than our software is still working.

our .Net client is not working anymore with the updated version of the open62541 library.

Checklist

Please provide the following information:

• [ X] open62541 Version (release number or git tag):1.3.6
• [ X] Other OPC UA SDKs used (client or server): client OpcFoundation.NetStandard 1.4.371.96. and UAexpert
• [ X] Operating system: Linux and Windows
• Logs (with UA_LOGLEVEL set as low as necessary) attached
• Wireshark network dump attached
• Self-contained code example attached
• Critical issue