Increasing value of step_per_epoch give unexpected outputs

[KerimM-bit]

Hello, When I train model with step_per_epoch=25, I do get results with weight file and all that. Though my output result is really bad, so I am trying to change step_per_epoch to 500 for example. but as a output all I get is .yaml file no error warning anything. just yaml file after approximately 25 sec. I tried with value 125, 200 etc. but it is the same.
You can see the result I'm getting from here

Any ideas how I can fix this?