Unsync issue retrieving media immediately after toMediaCollection() in v9

[LufoX11]

Hi. I'm not sure it's something it was alredy fixed in a later version but I'm facing this issue in v9 (I can't upgrade to v10 due to PHP < 8):

$user->addMediaFromBase64(...)->usingName(...)->usingFileName('image.png')->toMediaCollection(...);
$source = $user->getFirstMediaUrl(...);
dd($source); // ""

If I reload $user or add $user->load('media') after toMediaCollection() then it works as expected.

$user->addMediaFromBase64(...)->usingName(...)->usingFileName('image.png')->toMediaCollection(...);
$user->load('media');
$source = $user->getFirstMediaUrl(...);
dd($source); // ".../image.png"

Am I doing something wrong?