ffmpeg gets into infinite loop with some audio chain

[bakaiadam]

Summary of the bug:
If you have a short audio and try to get only the non silent parts then amplify the non silent part, it just hangs. If the duration is 1.5 seconds for example, it works just fine.
How to reproduce:

% ffmpeg -f lavfi -i "sine=frequency=1000:duration=0.5" -y test.wav ; ffmpeg -i test.wav  -af   'silenceremove=stop_periods=-1:stop_duration=0.5:stop_threshold=-70dB,loudnorm,dynaudnorm=g=3:f=200' -y b.flac
ffmpeg version N-56320-ge937457b7b-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 8 (Debian 8.3.0-6)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg

Patches should be submitted to the ffmpeg-devel mailing list and not this bug tracker.

[Carl Eugen Hoyos]

Regression since d7fead80ad994243b35bf4d43324f3fa72c11e9d

[Carl Eugen Hoyos]

Independently of the true or deeper cause of the issue, I need these keywords to have a slight chance of ever finding the ticket again.

[Carl Eugen Hoyos]

Output is shorter after 3e3c408e3fc9ba3ad861e1d3aea22f9e8c1a3894

[Elon Musk]

Lies. Fix your stupid tool.