PersonAvatar weird border when azureId is invalid

[Jonathanio123]

Describe the bug
Noticed that personavatar shows an odd border when the azureid is invalid. Don't know if this is intended or if it should be allowed to pass in an invalid id.

To Reproduce

<PersonAvatar azureId={undefined} />

Expected behavior
A placeholder icon similiar to the old fusion-component version:

Screenshots
size={AvatarSize.Small}

size={AvatarSize.Large}

size not set

Desktop (please complete the following information):

• OS: Windows
• Browser Edge, Chrome and Firefox

Additional context