Error 500 when accessing a private conversation

I'm using the Tusky and Roma Android apps and when accessing a private conversation with another user I'm getting error 500. This error happens on pleroma.site, pleroma.fr and bikeshed.party. Not sure about others. Here's the error log:

Response{protocol=h2, code=500, message=, url=https://pleroma.fr/api/v1/statuses/9fxfSzANHPSTp9zn2u/card}

Weird is that at the same time the app also makes 2 requests for these 2 api endpoints:

api/v1/statuses/{id}

api/v1/statuses/{id}/context

But these two work and actually having a conversation with the user works like it should. I'm not seeing any error when accessing the websites in a browser.