This subject was discussed on many occasions several times in the past on this forum. The Search function can sometimes be very helpful. It’s recommend that you try it out so that you appreciate the usefulness of it 
This problem has been around for many months and no one (including eWeLink?) knows why or where it came from. It is what it is and for now there is nothing we users can do about it. Interestingly, the updates are not visible in the app and in eWeLink Web. One has to follow the forum where the Staff of SONOFF in different persons informs promptly (or with a delay 
) about available versions.