Proper way yo deal with uri segments?

I have my development environment at the web server root (accessible through http://localhost:8080/), but my production installation is in a subdirectory of the web server root (https://site.lt/my_subdir/).

For some reason, the uri helper on the production environment returns the subdirectory name as the first element in the segment array. So I have to use funny workarounds to get the same segment in both installs, see code below. I do have proper base url settings in the .env files in each environment (app.baseURL variable points to the above-mentioned addresses)...

So, my question is: is there a better way to use the CI4 uri helper? Is there a bug in the code?

PHP Code:

$uri = current_url(true);
if ($uri->getSegment(1) == 'my_subdir') $sgm = 5; //bug in uri?
else $sgm = 4;
if ($uri->getSegment($sgm) == 'pdf') $variant = 'pdf';
else $variant = 'regular'; 


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Donatas G.