Currently running steam only, metamod 1.21-am, latest dev build amxx 1.8.3, windows. The crash happens when a real player joins team and a bot is kicked. For example, these are the last few logs before crash.
L 07/14/2017 - 11

3:52: "???<880><STEAM_0:1

??????><>" joined team "TERRORIST"
L 07/14/2017 - 11

3:53: Server cvar "bot_quota" = "11"
L 07/14/2017 - 11

3:53: Kick: "Superbot<877><BOT><>" was kicked by "Console"
L 07/14/2017 - 11

3:53: "Superbot<877><BOT><TERRORIST>" disconnected