a2v2-infer MODEL.native.pt AUDIO.wav events.tsv \
  --threshold 0.50 --method avg --fusion-window-seconds 0

Raise the threshold: which weak events vanish, and which runs fragment?

a2v2-infer MODEL.native.pt AUDIO.wav events.tsv \
  --threshold 0.50 --method max --fusion-window-seconds 0.10

Average can attenuate short peaks. Maximum can extend or merge nearby events. Inspect both timing and false positives.