zmNinja montage stops working randomly

[pliablepixels]

It seems, for some odd reason zms dies randomly.
Don't quite know why, but I'm trapping image load error and regenerating connkey as a fix.

On my system, I see the logs below. But in others its a different message (including could not authenticate user etc.). I think the core issue is the same, zms quits. Why - I don't know. Will eventually debug.

==> /var/log/apache2/error.log <==
[Fri Dec 07 14:13:01.914714 2018] [cgi:warn] [pid 28391] [client] AH01220: Timeout waiting for output from CGI script /usr/lib/zoneminder/cgi-bin/nph-zms
[Fri Dec 07 14:13:01.914760 2018] [cgi:warn] [pid 28347] [client] AH01220: Timeout waiting for output from CGI script /usr/lib/zoneminder/cgi-bin/nph-zms

==> /var/log/syslog <==
Dec  7 14:13:02 homeserver zms_m7[28681]: INF [zms_m7] [Got signal 15 (Terminated), exiting]
Dec  7 14:13:02 homeserver zms_m6[28680]: INF [zms_m6] [Got signal 15 (Terminated), exiting]