Yeah i can confirm it as well.

I do have a theory however. Dont place anything in the large window to the right, put it among the trash you use to recycle with (so in one of the 12 small "windows"). It will figure out you want to clone ammo just fine. The end result is supposed to go into the big window, so i have a feeling the already present stack of ammo somehow bugs out the weight addition. After i stopped using the big window myself, i think my free load issues stopped.

Havent seriously tested it though. Someone else do that