I tend to keep a Developer Console open when testing code, so that I can get debug logs automatically for my session. Today I am finding that when I open the console I do see logs appear, but after a while I stop getting them. It's not long enough for the console session to have timed out (maybe 10 minutes, sometimes less), and the Debug menu does not give the "Resume Updates" option. This is even happening when running anonymous apex code; after a few executions, it stops showing the logs. Closing and re-opening will start it capturing logs again.
I just realized that this sandbox was upgraded to Summer '15 this past weekend. Is anyone else having issues with logs being listed in the Developer Console?
edit: To be clear, I can click on a listed log and see it without issue. The issue is that after a brief interval, new logs stop appearing in the log panel.