Firefox: getStatsResult.audio[sendrecvType] is undefined

[dani12817]

getStats v1.2.0
Firefox 89.0 (64-bit) this example: https://www.webrtc-experiment.com/getStats/

I'm getting this error:

getStatsResult.audio[sendrecvType] is undefined getStats/getStatsParser.checkAudioTracks@https://cdn.webrtc-experiment.com/getStats.js:368:13
getStatsLooper/</</<@https://cdn.webrtc-experiment.com/getStats.js:260:48
getStatsLooper/</<@https://cdn.webrtc-experiment.com/getStats.js:257:45
getStatsLooper/<@https://cdn.webrtc-experiment.com/getStats.js:255:21
getStatsWrapper/<@https://cdn.webrtc-experiment.com/getStats.js:312:19
promise callback*getStatsWrapper@https://cdn.webrtc-experiment.com/getStats.js:307:60
getStatsLooper@https://cdn.webrtc-experiment.com/getStats.js:252:24
getStats@https://cdn.webrtc-experiment.com/getStats.js:956:5
answererPeer/answerer.ontrack@https://www.webrtc-experiment.com/getStats/:442:33