This is the biggest problem I have with this game. Lost count of the number of games it has cost me just because either the field decides to change itself after each time you set it or the menu to change the field won't even open up once the over is underway. Never had this problem with DBC 14 so not sure how they've managed to have it here. Shambolic.
To make things more realistic, I play using Pakistan, so just as in real life, the players don't do as they are told and their performance is unpredictable!
On a similar note, I preferred the DBC 14 format of default online 5 over game where you had 4 fielders out for power play of 2 overs. The default now of 3 fielders out for all 5 overs just turns the game into a slogging competition. I know we can set our own parameters but when playing online the default is the easiest way to get a game.