When the problem disappears with restarting Sanderling, it is tricky to document. In this case, a snapshot of the eve client process might not be sufficient to reproduce the problem.
You can save the memory measurement to a file which might be helpful for investigation. In the Sanderling app, you do it like described in the guide at How To Save A Memory Measurement To A File, use the MemoryMeasurement path to get the measurement before parsing. When you don’t have the measurement in the Sanderling App, you can use the approach from Parse.MemoryMeasurement serialization across processes to serialize the memory measurement to a string and then save this to a file using UTF8 Encoding.
In any case, record a screenshot of the eve client window along with the memory measurement.