Training dosen't progress for repeating sequences of 2bit x 12

Question

I am testing simpleRNN model

My test data is super simple repeating triple 2bit * 12

[1,0,0,0,1,0,0,1,0,0,0,0],[1,0,0,0,0,1,0,0,0,1,0,0],[0,0,1,0,0,0,0,1