I am trying to replicate the migrating trench test case on ROMS.

I was able to get the expected result for the initial bed thickness (blue line) then ran from restart of the initial simulatio.
But I did not get the expected final bed thickness (red line). The trench got deeper instead of migrating to east.

I am using the ROMS from COAWST ver201903. What other setting am missing out?
Thanks in advance!