we dont post here for help because we dont know, we know but we ask for other solution other than you used, like a plan b

alternative option

because i can fix this by doing this

adding  
$ENV{SCRIPT_NAME} to form 
and keep values available even if page reloaded, and it works 100%

<form action="$ENV{SCRIPT_NAME}" method="post">

<input type="hidden"  name="dbid" value="[% name.0%]">
[download]

but wanted to use other way if available

if you want to help, you help else if not interested you ignore the question

the thing was values run away after page reload, is there any other option to store values other than $ENV{SCRIPT_NAME}