Android - shadow quality affecting dynamic light brightness

hi!

ive come across this issue where the shadow quality setting is affecting dynamic light brightness on Android (both OpenGL ES and Vulkan) in 5.7:

Android low shadow quality:

Android medium shad quality and above (expected result):

i get the above behaviour when packaging and deploying onto a mobile device.

for reference this has in SM6 the brightness is similar to the low setting in Android but consistent between all shadow quality settings:

i would like to add that this project was upgraded from 4.27 to 5.3 and now 5.7. before 5.7 the dynamic light brightness looked like the android medium shadow screenshot above and consistent between SM5 and Android.

any help would be much appreciated, thanks!