The data seems to be taken on July 1 each year. So, the large growth in the 8 months 7/1/2019 to 3/1/2020 might overshadow any decrease in growth in the 4 months from 3/1/2020 to 7/1/2020. The data's so pixelated that it's tough to tell.
Also, you may be mistaking a decrease in growth rate with a decrease in number. The population graph should be decelerating, but still going up - our death rate obviously isn't as high as our birth rate. Just like when you tap the brakes on a car going forward - it doesn't start going backwards, nor does it necessarily come to a stop. The speed just decreases.
Finally, it might take awhile to get the data sorted out. Hell, they're still adjusting the estimate on when we passed 6 billion, which is sometime in 1999. Getting a good estimate on world population is not a trivial matter, and it really is literally a moving target.