essences upgrade is not an upgrade its an downgrade

hello,

i dont know if its a bug or intended.

but if i put 3 little essences in the reforging bench, i dosnt get a greater essences back. i get the same lower essence. but only one. so i wasted 2 materials.

i thought it shuld have been a greeater one. otherwhise upgrading this dosnt make sence, in that case it shouldnt be possible, like with other things too.