Importing LPCM tracks - Silence added to beginning

Audacity adds about a minute of silence at the beginning of every LPCM multitrack file I add. All other high rez files import properly (hd-dts + DD-hd). All 6 tracks are added properly otherwise.

thx for your help

Where did the files come from?
What is the full format of these files?
How (exactly) are you importing them?

I installed on another computer, demuxed the original file and had no problems! Looks like the problem doesn’t lie with Audacity. Thx for your help…Feel free to delete this thread if you like.