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Hello,
i have a little problem with adding a custom column to customers grid. I used hookActionCustomerGridQueryBuilderModifier and hookActionCustomerGridDefinitionModifier... everything works great but only in debug mode.
Is there something I should also do?

Cache is disabled, but i think it has something to do with cache or pagination, because now when i tested it: when i clicked on second page the grid won't load,

I've made $countQueryBuilder = $params['count_query_builder'] which "settings" are the same as $searchQueryBuilder = $params['search_query_builder'];