Random walk resulting in single nodes

I am dealing with a graph (bipartite) with total of 159,460 (117886 + 41574) nodes. The number of edges is 3,179,053. The random walk results in single nodes, so there is no paths present. When I took the first 10,000 rows of my graph, I got the path. I am wondering what could be the reason for this? I can send you my file for the graph if you want. 