It is a useful work around but it should not be required. I got out of the habit years ago when this was fixed in the old system.
Lately, I've been logged out, it seems, at random timeouts, regardless of what OS I login with, XP, OSX, Amiga. The last 2 times the requester was different - showing the re-login requester right there. I made the mistake of hitting the Back key (worked in the past) instead.
BTW - Last night I remained logged in for hours.
Sorry for the anger. I feel much better now, even without medication.