Zend certified PHP/Magento developer

How to find out the reason Magento 2 Allowed memory size exhausted although memory_limit = -1?

Hope you are doing well!
I have get issue when load product grid page with param is p=2.
Fatal error: Allowed memory size of xxx bytes exhausted (tried to allocate xx bytes) in /xx/vendor/magento/framework/Interception/PluginList/PluginList.php on line 266. My php.ini file is set memory_limit = -1.
I don’t know how to resolve this. So any suggestion help me check this is wellcome!