Fórum podpory pro Firefox

I would like to report there is a problem which has been taking some time on Vinted websites. (vinted.it, vinted.fr, vinted.cz, vinted.pl …) It concerns the private messages, when you click the inbox icon in the right upper corner, the right side part of the page with the last message shows, but the left part where you can switch individual conversations from various sellers does not load, I have just checked Android Firefox and the issue is present there too, unfortunately. Other browsers work fine though.