Thanks for the file. This problem arises because of the combination of using the Evenly input with a the segment set to Right Align. You can see the issue in the illustration below.
As you can see, aligning the right side of the segment to the Evenly divisions results in a gap at the end of the array. There are a couple of solutions.
1 - If the spline is always exactly in multiples of the segment size, the easiest fix is probably to wire the segment to the End input.
2 - An easier solution might be to use the Default
input, and then set the deform mode to Adaptive
I hope that helps, please let me know if you have any further questions.