Hi,
you can go to Mod Settings, look for LTN Combinator Settings under the "Map" Tab.
Turn off "High Provide Threshold for Requester".
It is a safety feature. It can happen sometimes, that your Requester gets too much items, maybe because you put something in manually or send a train there to get rid of items.
If you set a provide threshold to any very high number, there will be no accident, that LTN might think your Requester is actually providing something.