Issue with SourceTimestamp and ServerTimestamp

[jiangjunjie01]

I am using library version 1.5.378.134.
I have encountered an issue:
After starting the ServerTest server, I connected to it using the UaExpert client and clicked on a specific node to view its information in the ATTRIBUTES window.
I noticed that every time I perform a 'Read' operation on this node, both the SourceTimestamp and ServerTimestamp are updated to the current time. This doesn't seem right; shouldn't the SourceTimestamp remain unchanged?
Additionally, after I 'Write' to this node, subsequent 'Read' operations always show the exact same timestamps from the moment of the write. While it is correct that the SourceTimestamp remains the write time, the ServerTimestamp should be updated to the current time, shouldn't it?
Please note that all read and write operations are performed via UaExpert, meaning they are read/write requests initiated by the client.