Why does XFCE take so long to load on Solus?

Well, I’ve been using Solus with KDE Plasma for a few weeks now, and I’ve really enjoyed it! But I’ve been having some problems with KDE Plasma, nothing to do with Solus, just the nature of Plasma.

So I thought about using XFCE, and I tested it on my laptop, and strangely, it takes a long time to load, it stays on that black screen for a while (but the panel loads without problems), and that’s bothering me. I also tested it in a VM, and the problem persisted (I recorded it with Spectacle, but I couldn’t upload the file here).

And I’ve used XFCE on several other systems, Void, Chimera, FreeBSD, Xubuntu, and I don’t understand why this is happening on Solus. Is there any solution?