I'm using the Yandex browser and I have the same problem. The versions 126.96.36.1992 and 188.8.131.529 are affected. After a downgrade to version 184.108.40.2068 Auto-Fill works fine again. Please fix this as soon as possible. Without Auto-Fill the app is useless to me. I'm using Android 10 on a Samsung Galaxy S10e.