Dispatcher refresh has limit of 15 thousand utterance.

[careernavigator]

It seems LUIS dispatcher refresh has the limit of 15 thousand utterances. it is not taking beyond this limit. Can we increase this limit? currently it is randomly removing utterances beyond 15k randomly and due to that dispatcher is not returning expected intent.
Is there any way to increase dispatcher limit? or how do we handle it so that dispatcher returns correct intent?
currently dispatcher is connected to 3 qna services & 1 luis-general, and for all these 4 services total utterance count is beyond 25k. So we need to manually add the utterances in dispatcher so that it returns correct intent.