Freeform answers disapears when reviewing before / after submiting

This bug happens quite oftenin freeform questions. The selected answer disapears when the learner returns to the slide to review before submiting, and after submiting.

An example :

Immediatly after answering (original state) :

 When reviewing before submiting, the selected answer has disapeared :

 And even during post-quiz review.

Am i the only one? Does anyone have a solution to this please?

Thanks!!

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