Bamboo SCP plugin copies directories wrong

From https://support.atlassian.com/browse/BSP-13228
Given this directory structure in artifact:

+ dir_a
| + dir_a_1
|   + file a_1_1
+ dir_b
| + dir_b_1
|   + file b_1_1
+ dir_c
| + dir_c_1
|   + file c_1_1

remote location will contain structure like this

+ dir_a_1
| + file a_1_1
+ dir_b
| + dir_b_1
|   + file b_1_1
+ dir_c
| + dir_c_1
|   + file c_1_1

This is reproducible on atlassian-bamboo-scp-plugin:5.0.5 (used in Bamboo 5.1.0) and on most recent atlassian-bamboo-scp-plugin:5.0.8