Modern UI List date column default values bug?

I've found that the Modern UI has an issue with default values for date columns.

 

I can reproduce this in multiple tenants, and with the following configuration:

 

2 date columns:

'date default today' - default value set to 'Today's date'

'expiry' default value set to calculated value =Today+7

 

In the modern UI, the new item renders as below:

 

 

In classic, it renders like this:

I've found that a default value of a specific date renders correctly - so the issue appears to be limited to where the date default value is calculated or 'today'.

 

Is anyone else seeing this behaviour?