Unbound uses all available ram and dies

[nikkon]

Hi all,

For some days i noticed that Unbound DNS Resolver dies.

last pid: 27062;  load averages:  0.19,  0.46,  0.36                                                                                                                                                                  up 0+00:08:35  22:44:08
64 processes:  1 running, 63 sleeping
CPU:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt, 99.9% idle
Mem: 5107M Active, 451M Inact, 980M Wired, 661M Buf, 1330M Free
Swap:

PID USERNAME    THR PRI NICE  SIZE    RES STATE  C  TIME    WCPU COMMAND
17824 root          1  52    0  284M 36100K accept  1  0:00  0.29% php-fpm
54247 unbound      8  20    0  9236M  4848M kqread  3  1:28  83.00% unbound

Did anyone has any clue about this behaviour?
restart didn't work, killing the process doesn't help eather

If I stop Suricata it works file…if Suricata for exampe is enabled then unbound goes to out of memory the the pid ends up being killed.