Nintex "clasic" multiline texbox conversion to K2 5 for Sharepoint.

HI, we are preparing to shift from Nintex on premise “classic” to K2 5. 
While preparing for this we noticed that sharepont multiline koloms filled by Nintex “classic” are displayed in k2 including html coding, see below. 
Does anybody have a solution for this?
Is a conversion necessary? 

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