Battle stops responsing after T15.

so maybe TL and devs already know this but i still wanted to make a post coz its costing us Energy.
someone in general chat told me how to check the issues in console and so i did. all skills are locked/failed after turn 15.
console shows Action failed with error 500 ( indicates a 500 Internal Server Error). and first we weren't getting charged 2 energies. but i saw 1-2 times that energies were deducted when we try to flee. so i switch between PC and mobile to flee coz in PC it wont allow me to flee and wont exit the battle after multiple refresh and hard refreshes.

look at the attached screenshots please.