Is it possible to disable html code error auto fixing feature by wordpress 4.9.1?

I’ve found the solution for this referencing this site https://checknotes.wordpress.com/2016/02/06/unfiltered-html-in-wordpress/

WordPress Multisite only allows unfiltered_html capabilities for super admin, which explains why administrators and editors HTML keeps disappearing. I decided to use ‘Unfiltered MU’ WordPress plugin to allow unfiltered_html for admin and editor role

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