Implementation not working for even-length time series

[ms2017]

Hello.

I am currently fiddling around with the Experiment 1 notebook and also tried changing the sequence length. It appears to me that the Fourier Flow implementation only works for time series of uneven length, i.e. 101, but not 100. In the even case, I get a reshaping error in forward.

Did I miss something here?
Do I have to pad each sequence to uneven length?