LB2120 reboots whenn SIP phone registers

hi,

I have my LB2120 set in bridge mode. it works just fine for internet use, but as soon as a SIP call comes in, the LB2120 reboots itself.

using the latest fw version

Firmware Version: M18QW_v07.05.170721
Firmware Build Date: Unknown
App Version: NTG9X07W_13.05.05.00
Web App Version: LBHDATA_03.03.103.175
Bootloader Version: Bootloader Ver: v1.0.0
Hardware Version: 08

is there a fix available ?