reportd CPU Utilization often at 99%

Fortigate 90d running 5.4.2, happened on 5.4.1 as well.

Very often, my FG90D is at very high CPU utilization.

Diag sys top shows reportd is always the culprit.

I've tried a lot of things, and cannot resolve the issue.

Log Settings -> Enable Local Reports is off.

It has a very basic configuration, can easily be rebuilt.

Does anyone have any ideas?

(I've killed reportd, it comes back some time later.  I've tried different firmware versions, same problem)

Diag sys top results:

un Time:  18 days, 3 hours and 29 minutes

97U, 2N, 0S, 1I; 1839T, 1122F

         reportd     1404      R      97.4     0.8

          httpsd      132      S       0.7     1.4

          newcli     2512      R       0.7     0.8

          httpsd      133      S       0.3     1.4

          httpsd     2507      S       0.1     1.2

          cw_acd      108      S       0.1     1.1

            iked       86      S       0.1     0.7

       ipsengine     2363      S <     0.0     4.5

        dnsproxy      105      S       0.0     2.1

         pyfcgid     2484      S       0.0     1.7

         cmdbsvr       39      S       0.0     1.6

         pyfcgid     2483      S       0.0     1.5

         pyfcgid     2482      S       0.0     1.5

         pyfcgid     2481      S       0.0     1.4

       scanunitd     2371      S <     0.0     1.4

       scanunitd     2372      S <     0.0     1.4

       ipshelper     2362      S <     0.0     1.4

       scanunitd       85      S <     0.0     1.4

         sslvpnd       76      S       0.0     1.3

         miglogd       58      S       0.0     1.2

fg90d #