potential FortiOS 6.0.9 memory leak

We reverted FortiOS 6.0.9 back to 6.0.8 after nine days, because memory usage went up from 41% to 46% and kept growing.

At cli, "diag sys top-summary '-n 5 --sort=mem' " showed 

6.0.9:

PID RSS CPU% ^MEM% FDS TIME+ NAME * 208 1G 0.0 17.6 637 34:16.79 ipsmonitor [x9] 202 353M 0.0 4.4 64 38:45.62 miglogd [x5] 231 82M 0.0 1.0 31 11:46.27 dnsproxy 205 67M 0.0 0.8 23 00:56.10 httpsd [x4] 180 42M 0.0 0.5 14 00:30.36 cmdbsvr

6.0.8:

PID RSS CPU% ^MEM% FDS TIME+ NAME * 207 890M 0.9 11.1 620 54:46.18 ipsmonitor [x9] 230 81M 0.0 1.0 31 18:20.45 dnsproxy 204 69M 1.9 0.9 27 02:51.66 httpsd [x9] 201 53M 0.0 0.7 65 00:46.10 miglogd [x5] 259 49M 0.0 0.6 17 02:28.83 updated [x2]

Do you have the same issue?

Ray