This is just a rare edge-case, so we don't have to fix this. But, in case someone wants to contribute a fix, the current highlighter can't highlight two or more PHP attributes defined on the same line, as in:

#[Argument, Ask('Enter the cloud region name')]
CloudRegion $region,

See https://symfony.com/blog/new-in-symfony-7-4-improved-invokable-commands#:~:text=If%20your%20interactions%20only%20involve%20asking%20for%20missing%20argument%20or%20option%20values%2C%20you%20can%20make%20them%20even%20more