Zoho CRM Integration and German vowels

Zoho CRM Integration and German vowels

Hi Zoho forms team,

we have the Zoho CRM lookup integrated and it finds contacts via Last Name. This works only for contacts who's names do not contain any mutated vowel such as ä,ö,ü. Any contact with such a vowel in his name does not show up (the search returns "No matches found."). 

Can you help with this bug please?

Thank you, Jens