If you catch the same fish every time, press R before your next cast and the the game will reset without hindering your progress. If you catch the same fish again, continue to press the R key in between each cast. After a while you will notice a variety of fish again without having to press R.
New Features added in v1.3: I added new bait: bread. Bread catches fish faster. Bait has been changed to worms You have to wait for the fisher to finish showing off his fish before you can cast your line again, proving it harder for glitches to occur.