RT-AC88U freeze randomly using 384.19

[pam]

Hi,
For no reason the 384.19 stop working during high network traffic.
Are there more with the same issue or solution.
Did a reset to factory, but the same problems and i do not use JFFS

the only strange thing in the log is this
Sep 20 12:15:01 rc_service: httpds 439:notify_rc restart_wireless
Sep 20 12:15:03 kernel: device eth1 left promiscuous mode
Sep 20 12:15:03 kernel: br0: port 2(eth1) entering forwarding state
Sep 20 12:15:08 kernel: device eth1 entered promiscuous mode
Sep 20 12:15:08 kernel: br0: port 2(eth1) entering forwarding state
Sep 20 12:15:08 kernel: br0: port 2(eth1) entering forwarding state

Pam