Ship shields/Hull bug?

thelata

Ive been playing STO since launch have all maxxed gear/ships etc but im having a prob recently with my ship shields and hull just dropping right down to 10-20% just from small enemy fire then shooting back up to 100% then down to near zero again just by borg probes or similar small enemy fire,my dreadnought and similar cruisers have 110k hull with epic gear etc but just getting annihilated,any suggestions