NightWatch js doesn't work stable

[srknnn]

I want to make e2e test. Sometimes nightWatch js works properly. although I use the same command and having same code Sometimes it doesn't work.
Also I use two ways to run for different target url.
First one is localhost url. Second one is environment. NightWatch gives different results for the two target url. although these two url have same source code
The errors are about
Timed out while waiting for element <.autoTest_highlight_EdtrComp_1> to be visible for 5000 milliseconds. - expected "visible" but got: "not visible" and
Timed out while waiting for element <.autoTest_highlight_EdtrComp_1> to be visible for 5000 milliseconds. - expected "visible" but got: "not visible" that I see.
What can i do for work stable. Maybe there are some config settings or something else?

[Pieras2]

Too few description to analyse it.