She is probably still trying to adjust to new environment and feeding schedules in the IFC since she is more used to direct latching. Try to communicate to the teacher to understand what is her milk feeding schedule in the centre (e.g. are they feed twice a day only?), then request teacher to adjust the feeding timings. Also, you can prepare solids food for your baby and bring to IFC so you don't have to worry if she take less milk.
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