L4D Server Restarting During Map Load

[Ommand]

For the last few nights I've noticed that my L4D server occassionally crashes (?) during map load. What happens is the map change takes longer than normal and the server starts timing out, then when the map finally does change it goes to the first part of No Mercy in Coop mode regardless of what was being played previously.

The server is linux based and running Metamod:Source 1.7.0 and Sourcemod 1.3.0.

Code:

server.cfg

hostname "RefugeGamer.com L4D Community|HLStatsX|"

rcon_password "xxxxxxxxx"
sv_search_key "xxxxx"
exec banned_user.cfg
exec banned_ip.cfg
sv_visiblemaxplayers 8

// HLstats stuff
log 1
logaddress_delall
logaddress_add 64.22.97.95:27501

mp_disable_autokick 1
sv_alltalk 0
sv_cheats 0
sv_consistency 1
sv_contact
sv_downloadurl "http://www.refugegamer.com/l4d

sv_voiceenable 1
sv_alltalk 0
sv_voicequality 5
sv_voicecodec vaudio_speex
sv_reservation_timeout 180

sv_region 0
sv_maxupdaterate 120
sv_minupdaterate 20
sv_unlag 1
sv_maxunlag .5

sv_log_onefile 0
sv_logbans 1
neph_nostats 1

sv_allow_lobby_connect_only 0
sv_gametypes "versus,coop,survival"
setmaster add 68.142.72.250:27011
setmaster add 69.28.140.246:27011
setmaster add 69.28.140.247:27011
setmaster add 72.165.61.189:27011

And here's all I'm getting in the srcds logs: http://ommand.net/stuff/l4d_crash.log

Anyone have an idea what could be going on here?

Edit: the server is hosted with gameservers.com

[Ommand]

Problem persists without MM:S or SM loaded, and isn't specific to one map.