The behaviour was observed in sessions that had not been open very long (half an hour). We did some examination via the task manager but could not find anything in terms of memory hogging, out of the ordinary CPU usage or networking activity. Network latency does seem like a credible cause. Indeed, I'm working with a remote server and, moreover, the bandwidth for a fixed connection is not impressive given the activity of the offices. I have not had this issue when I worked on the other side of the line and it could also account for the erratic occurrence of this phenomenon; in the past few days I have not observed it. I'm afraid however that there is no practical means of testing the hypothesis as there are a great number of variables in play here such as virtualization and what not.
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