Yes, as Gale Andrews wrote in this post Waveform missing - #3 by Gale_Andrews it is a known issue.
The issue and a workaround is noted in this sticky topic: Audacity 2.1.0: FFmpeg required for MP4/M4A/MOV/ALAC import
Yes, as Gale Andrews wrote in this post Waveform missing - #3 by Gale_Andrews it is a known issue.
The issue and a workaround is noted in this sticky topic: Audacity 2.1.0: FFmpeg required for MP4/M4A/MOV/ALAC import