The same thing happens when Wanda throws Monica out of Westview- the scene just switches to Wanda calmly rocking her twins from her confronting Monica.
The anomaly is rendered meaningless which means that while Wanda does retain the memory, it stops mattering to her afterwards.
Wanda is, at best, a red herring, meant to distract us from all the signs that point at someone else.
Remember, Agnes said in Episode 2 that Wanda is “the star of the show,” but there is someone who is directing the story.