It could be the high temps causing it then vlad mate. Just found this on growweedeasy.....
What type of stress can trigger bananas to form on cannabis buds?
Inconsistent Light Schedules & Light Leaks - When plants don't get light at the same time each day, or if they're exposed to light during their dark period (light leak)
Heat - When temps get too high hermies and nanner often appear.
Too-Bright Light - Like too much heat, light that is too bright can stress your plants and trigger hermies. This is most often caused by growers keeping their lights to close to their plants. You can light-burn your plants even when temperature is under control.
Major Plant Problems - Major plant problems like nutrient deficiencies, root rot, pH problems, light-burn and nutrient burn can all trigger bananas to start growing
Genetics - While stress plays a big role in the formation of bananas, the tendency to form them seems to be genetic. This tendency is very common in the seeds of a plant that hermied - these “feminized” seeds, while always female, are much more likely to show the same herming traits as its parent.Growing seeds that were produced this way is naturally selecting to produce more buds that grow bananas.
just pull them off keep a close eye out and go buy advanced nutes revive I swear it works wonders on lady boys....