get_terms with set fields 'id=>parent' not return the id key

[fantasyworld]

when use the id=>parent with number and fields in id=>name or and other id=>xx type.
In same case if the query return $terms array items in bigger then the number in you set with call the function.
It use the

<?php
array_slice( $terms, $offset, $number );

to cat the array into number you want
But this cat action will let the array id reset to 0, 1, 2 ... NOT the id of the term
may use the

<?php
array_slice( $terms, $offset, $number, true );

to keep the old id in the new array

[dd32]

Introduced with [10416]

[boonebgorges]

In 36252:

Don't reset index keys when trimming results of term queries.

array_slice() must be told to preserve keys when the query results exceed the
limit specified the 'number' parameter, so that id=>parent and other
id-indexed return value formats don't get mangled.

Props fantasyworld, wpdelighter.
Fixes #35382.