The 10th Doctor didn't have amneisa, he immediately tried to get Rose to go on whatever trip they had been planning before his regeneration. The 11th didn't have amnesia. The 6th was confused for about 5 seconds, and obviously did that...thing... but didn't have amnesia. the 7th Doctor explicitly only had amnesia because of the Rani's injection. The 4th Doctor went crazy, but still wasn't amnesiac, same with the 5th Doctor. The 3rd Doctor had issues, but amnesia wasn't one of them. The 2nd Doctor referred to the 1st as if they were different people for a bit, but he didn't have amnesia.
Hell, the War Doctor didn't seem to have much regeneration problems either, he got right up and walked out. So, yeah, you have two cases of amnesia (that weren't artificially caused). Now, most regenerations have issues, which is fine (even if I prefer the 11th Doctor style regeneration at this point), but amnesia specifically is almost never there, and doing it in two regenerations in a row is asinine and gives the 13th Doctor a really bad impression on the audience. You don't have the first female Doctor question if she even is The Doctor, unless you're specifically trying to get the assholes who don't want a female Doctor some material for their bullshit opinions.
The 13th Doctor needs to start strong. Instead she's going to wander around for 45 minutes not actually being The Doctor until the end. This could easily be the worst opening episode since Time and The Rani, and it could easily be worse. I really have no interest in the first episode at this point, I'd skip it entirely and wait until episode 2 to start the next series if I wasn't such an obsessive nerd.