Game crash after a while even in 32 bits Gmod

When permanent spawners are set game crashes in 15 mins, in gm_construct which is a stable map it last more than 1 hour when constant Npcs are spawned and have no idea if is due to their set Player Dissapear radius value **_which when turned off gives same result_** or some internal code, tested around 40 red spawners in map possibly increases the chance to crash?