Energy drop when switching from HQ_core to ACELP

With 30632c9d,

when decoding at 32 kbps, there is an energy drop when switching from HQ-core (core==3) to ACELP (core==0). This can be seen in the image below for right channel:

This can be replicated using the following bitstream, the switching happens at around 18.5 sec:

bit

IVAS_dec STEREO 32 bit syn