Cmux with limited to 45 bytes

Hi all, I am working on a project and using BG95-M2 and I’m using CMUX for AT commands mutiplex, but I noticed that I can’t send more than 45 Bytes command inside CMUX and I can modify this even with
AT+CMUX=0,0,5,255,10,3,30,10,2. So for that I need to split in 45 Bytes segments, by in the manual there is no this limitation. Is this a Bug?

Thanks.

Could you please tell me your current FW version?