Help with Rotting Peppers

This year, all of peppers have been rotting/turning brown before they are ready to harvest. It doesn’t look like other examples I have seen of BER and I have tried switching fertilisers, changing watering frequency and moving the peppers to areas with more or less sun. Yet the problem persists.

I am growing in a tropical climate and for large parts of the year temperatures are very high. However, this time of the year conditions are much more ideal.

I would appreciate any help.

by Khaim_Innereye