Epic won’t fix this from here. Submit a bug report if you think the PSD importer is broken (or better yet, a PR and a bug report).
I’ve had plenty of issues in the past with other engines with the same issue. Most of the time the problem is the file format and not the importer. AFAIK Epic use more compressed image formats internally (otherwise your repository will grow exponentially will all the PSD source data), so it’s unlikely they’re going to stumble on this.