Hi, I had made a post about this glitch in the Troubleshooting topic before. I have waited patiently for more than a week, but the Duo team hasn't replied yet. I had suddenly lost my 565+ day streak, even when I had a Streak Freeze and had practiced that day. And the weird part is the streak reset to 3, not 0, not even 1.
Here's the link for the full post:
The thing is, others are experiencing similar, and worse glitches. Duo, please solve this.
If you think you experience(d) a glitch you should submit a bug report: https://support.duolingo.com/hc/en-us/articles/204728264-How-do-I-report-a-bug-