I was on a 29 day streak on Duolingo and after the Lingot update it went down to 16. I even have the daily email stating that I was on 28 yesterday. Is there any way that this can be fixed?
sorry I can't answer (Only Duolingo team can I guess). But FYI here (in the general discussion section, called Duolingo or General) your post will be quickly lost in the enormous amount of posts so, to have more answers/explanations to your feedback (or in your case to be sure that Duolingo's team will see it), it would have been better to post it in the Troubleshooting Discussion.
When you create a new discussion, there is a drop-down menu on the top, change from the default value "Duolingo" (which corresponds to this general discussion page) for the specific one (Troubleshooting, in your case). But you can change it now, it's not too late : edit your original post then select the Troubleshooting forum.
Or you should maybe ask it directly to Duolingo through the "Support" button.