The submission made might be reaching client's side as POST variables, can you try to alter your form's submission method to "GET" instead of "POST".

From

$form['#method'] = 'post';

To

$form['#method'] = 'get';

Good Luck !!!

The submission made might be reaching client's side as POST variables, can you try to alter your form's submission method to "GET" instead of "POST".

From

$form['#method'] = 'post';

to

$form['#method'] = 'get';