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Your question and the information you are giving us is too vague to have a precise answer. Try to reproduce the issue in a way that is failing all the time or define what do you mean with "Sometimes". Give us more information about what your plugin is in the scene (generator, deformer, tag etc..) and what it is supposed to do (created an object, use another object as input...). Also, what do you call "stop working"? Does the render stopped and start again over and over? Is it just black? Does only your plugins is not working?
Like this, i would say that your object plugin is a generator, and you are not checking if you can re-use the cache, so your object is always dirty, and the render restart from the beginning over and over.
Whenever it is possible try to reproduce the issue with the minimum amount of code so we can reproduce the issue on our system and check what is going wrong.