Flow accumulation raster is not in sync with actual river network

[rkbanagar]

Hi

A problem location in my study area on Open Street Map basemap as below

But, FAC derived through RichDEM with Dinf algorithm is not in sync with the basemap as below

And, FAC derived through TauDEM with Dinf algorithm is in sync with the basemap as below

Kindly help me know what could be the reason and/or reply for any more information/data to needed to get better understanding of the problem statement.

Thank you
Ramesh