Two things I note from the translated twice transcript.
1) 370 call level FL350 at 01:01 and then again at 01:07:55
2) The previous hand off was answered with freq. followed by "Copies that" "copies that" was used to acknowledge instructions 5 times until the hand off to KL RADAR. It wasn't used in response to the climb clearances and it wasn't used in response to the last hand off.
I wonder if the PF changed during the climb or perhaps after the 01 level call. Other pilot not sure if they had called level so made the call again.
Nothing really obvious and because it's a translation of a translation "copie that" may well turn out to be "Roger".