ISM1 energy burst in higher frequencies of transient (TD-BWE)

There is a high energy on the BW frequencies in another place on the onset for frame 1339 (see below):

BASOP output

Float Baseline

Core is ACELP and BW is TD-BWE. To reproduce:

IVAS_dec MONO 32 bit syn

and the following bitstream,

divers_32m_-ism_1_NULL_13200_32.bit

It should be noted that this is not a core coder transition core is the same as previous frame i.e. ACELP