Good day everyone.
I have this issue from the beginning of my Manjaro journey back in late 2017, it is minor but bothers me anyway. I've noticed recently that Kubuntu has no this problem that's why I want to get it sorted out finally because now it looks distro-related. Screenshot tells everything:
For those who don't get it: previews in Dolphin are fine, but KFileDialog doesn't show previews for files larger than 3 Mb. What can I do to fix this?