Siri can't respond to whatsapp messages anymore

Hi, since a few weeks I have the following issue regarding Siri and Whatsapp. Siri can still read my messages and I can still send a message to someone, but when I want to respond to a message that's been read by Siri, Siri says it has a problem. This is only happening in Whatsapp (normal messages work fine), but I use this feature a lot in my car. I've already reset my Iphone, but to no avail. Anyone here that has the same issue?

Regards, Koen