I have also noticed those random crashes with hlx:ce and counter-strike 1.6 server.
If you make debug version I'm also willing to test it if it is also suitable for public server.
Code:
L 02/02/2014 - 16:06:48: Start of error session.
L 02/02/2014 - 16:06:48: Info (map "de_dust2") (file "addons/amxmodx/logs/error_20140202.log")
L 02/02/2014 - 16:06:48: [AMXX] Displaying debug trace (plugin "hlstatsx_commands_cstrike.amxx")
L 02/02/2014 - 16:06:48: [AMXX] Run time error 4: index out of bounds
L 02/02/2014 - 16:06:48: [AMXX] [0] hlstatsx_commands_cstrike.sma::psay (line 629)
L 02/02/2014 - 16:06:48: [AMXX] [1] hlstatsx_commands_cstrike.sma::hlx_amx_bulkpsay (line 687)