A transaction in session 566 has been active for 491 minute(s) and running since 1/3/2018 4:47:33 PM

We see similar alerts often. upon checking for open transactions using dbcc opentran on the database, we don't see any open transactions. But the above alert hangs on for several minutes/hours. The session in question is actually in "sleeping" status doing very little IO/CPU. After a while this alert disappears. Just curious if any of other users got this similar "False" alert.