The dubbed versions of Digimon Adventure, 02, and Tamers appears to be leaving Netflix in April.
Some will remember this previously happened on August 1st, 2015 and a new contract was made relatively quickly for the shows (in their dubbed form) to return, so there is a decent chance that is simply happening again.
If you want to watch it before then:
Digimon dubbed on Netflix
At the moment this doesn't appear to be affect Digimon Fusion on Netflix or Digimon on any other streaming platform.
Thanks to NetflixAnime for the news.
At the moment the notice isn't showing in every Netflix interface (I had to pull it up on Netflix for iOS to find it and get a snapshot.)