Ok, thank you 😂

In the test case "Should work with complex path (7x7 map)", I got this failure:

Should work with complex path (7x7 map)
 Should return the right moves
expected: Just [D,D,R,R,R,R,R,D,D,L,D,L,U,L,L,D,L,D]
 but got: Just [D,D,R,R,R,R,R,D,D,L,L,L,L,D,L,D]

D,L,U has been replaced with L.
It seems to be the valid answer as well.