Buying seasons in advance on Amazon Prime Video

For the last few years I've been buying both TWD and FTWD a season at a time in advance on Amazon Prime Video. Usually a show will be available the next day (Monday). This time I bought both new seasons of FTWD and World Beyond. FTWD's episode #2 came out on Monday as expected but I'm still waiting on World Beyond EP4. Has there been any news about this? Are they slow rolling it to get more people onto AMC+? Or just a snafu?