After migrated our project(Tiki Wiki CMS Groupware => https://tiki.org/HomePage to smarty 5, I have the following error thrown in the template https://gitlab.com/tikiwiki/tiki/-/blob/master/templates/examples/search/related_tracker_items.tpl on line 5.

Error: Syntax error in template "file:examples/search/related_tracker_items.tpl" on line 5 "{if preg_match_all('/(.+?)\:([^\v]+)$/mis', $relationValue, $matches, 2)}" too many shorthand attributes

Any idea of the mistake in my code ?
I explored some issues reported in previous years about the same error message "too many shorthand attribute" but none of them helped me, they are not similar to mine expect that they are both related to the use of the {if}{/if} block.

Below is the entire content of my template