Streak numbers different on different platforms
I have a 166 day streak on my laptop/desktop and iphone, but only about 36 or so on my kindle (android). Can I synch them to the 166?
Try looking at your profile on your Kindle and see if that number matches up.
What you are seeing on the Kindle is probably your 'language streak' and what you are seeing on the other platforms is your 'overall streak'.
If I had to guess, 36 days ago you either used a streak freeze or didn't practice your primary language (but did practice your secondary language).