By the way i can confirm that even without plugins (just metamod 1.11 - build 1127, sourcemod 1.9 - build 6281, and left4downtown2 from Accelerator74) it crashes. It's not as often as when i used one of the listed plugins, but it still does.
Actually to be extra accurate i'm still using the defaults plugins shipped with sourcemod... But noone of these rely on Left4downtown2.
Just to be complete i'm going to list them here:
01 "Admin File Reader" (1.9.0.6281) by AlliedModders LLC
02 "Admin Help" (1.9.0.6281) by AlliedModders LLC
03 "Admin Menu" (1.9.0.6281) by AlliedModders LLC
04 "Anti-Flood" (1.9.0.6281) by AlliedModders LLC
05 "Basic Ban Commands" (1.9.0.6281) by AlliedModders LLC
06 "Basic Chat" (1.9.0.6281) by AlliedModders LLC
07 "Basic Comm Control" (1.9.0.6281) by AlliedModders LLC
08 "Basic Commands" (1.9.0.6281) by AlliedModders LLC
09 "Basic Info Triggers" (1.9.0.6281) by AlliedModders LLC
10 "Basic Votes" (1.9.0.6281) by AlliedModders LLC
11 "Client Preferences" (1.9.0.6281) by AlliedModders LLC
12 "Fun Commands" (1.9.0.6281) by AlliedModders LLC
13 "Fun Votes" (1.9.0.6281) by AlliedModders LLC
14 Disabled: "Nextmap" (1.9.0.6281) by AlliedModders LLC
15 "Player Commands" (1.9.0.6281) by AlliedModders LLC
16 "Reserved Slots" (1.9.0.6281) by AlliedModders LLC
17 "Sound Commands" (1.9.0.6281) by AlliedModders LLC
I'll post here the accelerator crashlog that i got. I didn't use any plugins that required Left4Downtown2.
https://crash.limetech.org/nh2buucmsuja
I see many others are crashing with the same crashlog. All started around last week of July. Interesting enough the 24th of July there was a Left 4 dead 2 Update. Don't know if that has anything to do with it.