problem with decrypted audio

[dark76]

I have some trouble with this(it's free, no account, but maybe italian vpn could be necessary): https://it.chili.com/player/ddacedd8-c10a-4fce-a788-1f857752a022?catalogId=220332a4-f4...1-8f6564997292

I can retrieve the keys (7f85f2829235bc7a2b043532a6ed32f9:6d3859af77e6a15f 4a58536e1a6606eb) and i can decrypt video and audio but weirdly the audio misses some seconds in the begin. But if i listen to the streaming, the audio is absolutely complete. What do i do wrong?
I download the encrypted videoand audio like this and i check the best video and best audio: N_m3u8DL-RE.exe https://d92bl47e32czt.cloudfront.net/s/vod/content_84/FW60899_IT2M/FW60899_IT2M_ita_SD.mpd



EDIT: Sorry, i understood the problem. If i do it in one passage (N_m3u8DL-RE -mt --key 7f85f2829235bc7a2b043532a6ed32f9:6d3859af77e6a15f4 a58536e1a6606eb "https://d92bl47e32czt.cloudfront.net/s/vod/content_84/FW60899_IT2M/FW60899_IT2M_ita_SD.mpd" -M format=mp4), it works