Q.My Bat Plant’s New Leaves Are Coming Out Crinkled
I live in a tropical climate in far north Queensland, Australia. My bat plant is outside and under cover. I have started to get my first new leaves and flowers, but the are coming out small and crinkled. I’ve fed it with slow release fertiliser and have reduced the watering. Is there something else I should be doing? Picture attached

Certified GKH Gardening Expert
Aside from making sure that there is no standing water and applying a fungicide there isn't much that can be done. It does appear to have overwatering damage, but I notice a lot of undecayed organic matter. This can cause nutrient deficiencies until it has broken down.
I would recommend a good, acidic potting soil with added perlite for extra drainage. A change to this may show improvement.
https://www.gardeningknowhow.com/ornamental/flowers/bat-flower/growing-bat-flowers.htm