segmentation fault in debian sid (and buster) - bitmask 0.10.3 rc1

:~$ ulimit -c unlimited
:~$ bitmask
[+] launching bitmaskd...
[6115:6141:0307/165914.969814:ERROR:nss_util.cc(808)] After loading Root Certs, loaded==false: NSS error code: -8018
[+] registering python<->js bridge
Segmentation fault (core dumped)
:~$ [6149:6149:0100/000000.223883:ERROR:broker_posix.cc(41)] Invalid node channel message

:~$ ps -aux |grep bitmask |grep -v grep
name     6123  0.0  0.7 940820 57660 ?        Sl   16:59   0:00 /usr/bin/python /usr/bin/bitmask
:~$ kill 6123
:~$ ulimit -c unlimited
:~$ bitmask
[+] launching bitmaskd...
[6554:6580:0307/170145.457860:ERROR:nss_util.cc(808)] After loading Root Certs, loaded==false: NSS error code: -8018
[+] registering python<->js bridge
[6588:6588:0100/000000.729545:ERROR:broker_posix.cc(41)] Invalid node channel message
Segmentation fault (core dumped)
:~$ ps -aux |grep bitmask |grep -v grep
name     6562  0.0  0.7 940824 57660 ?        Sl   17:01   0:00 /usr/bin/python /usr/bin/bitmask


:~$ dpkg -l |grep bitmask
ii  bitmask                               0.10.3+0~20180125171255.34584+0.10.3rc1+buster~0.g3ffc8065 all          Metapackage to install bitmask desktop client
ii  bitmask-core                          0.10.3+0~20180125171255.34584+0.10.3rc1+buster~0.g3ffc8065 all          Provides the core daemon for bitmask
ii  bitmask-js                            0.10.3+0~20180125171255.34584+0.10.3rc1+buster~0.g3ffc8065 all          bitmask javascript library
ii  bitmask-mail                          0.10.3+0~20180125171255.34584+0.10.3rc1+buster~0.g3ffc8065 all          Bitmask mail components
ii  bitmask-qt                            0.10.3+0~20180125171255.34584+0.10.3rc1+buster~0.g3ffc8065 all          Bitmask desktop client (qt5) to access LEAP Services
ii  bitmask-vpn                           0.10.3+0~20180125171255.34584+0.10.3rc1+buster~0.g3ffc8065 all          Bitmask core VPN daemon
ii  xul-ext-bitmask                       0.0.4+0~20150226193253.24+sid~1.gbp3d05c5                  all          Automatic configuration for Bitmask encrypted mail accounts

:~$ kill 6562




:~$ sudo apt install bitmask
[sudo] password for jorge: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
bitmask is already the newest version (0.10.3+0~20180125171255.34584+0.10.3rc1+buster~0.g3ffc8065).
0 upgraded, 0 newly installed, 0 to remove and 178 not upgraded.