TooL, that plugin is for CS (possibly other mods) where doors can't break by default. It simply moves them to an out-of-place location. In The Specialists, doors can be broken, and they respawn.
As for you, harbu, I'm not sure why they aren't respawning. You could try setting a task and forcing it to spawn again:
Code:
dllfunc(DLLFunc_Spawn,entid);
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