spc.est_spectra stalls and go to next step after some epochs

[kvshams]

In my data set (114k cells 100 gene sets and 10 cell types), spc.est_spectra stops after some epochs without any error message. Most of the outputs are being populated in adata except the adata.var['spectra_vocab']. This stoping behaviour is different if I re-run the data, ie 12% ,32% ,58% and 4% out of 10k epochs. I have not changed any parameters or compute nodes/vm. I have simply restarted my Jupyter notebook to rerun and see what is happening.