Reward problem special characters

Hello,
I’m testing the free wp-crowdfunding plugin and i state that when i type something like L’avion the text becomes “L'avion”
It seems that the ‘ character is misinterpreted. Same problem with special French characters like é or è.
I also state that when i enter a CR to separate lines in this Reward field then it is converted to ‘rn’.
Is there a solution to fix this problem.
I’ve no problem if i enter the sames charadters in the Advanced field.
Thanks for help.