Can confirm. OpenSUSE LEAP 15.2. Brand new laptop, 32GB RAM. Xfwm4 locks at boot after about five seconds and terminals/Thunar stop responding.
Ctrl+alt+F5 to a virtual terminal and killing xfwm4, then Ctrl+alt+F7 into XFCE again fixes the problem. And whatever xfwm4 is, for all intents and purposes the only difference I see in how XFCE is working is that everything started working. If this was Thunar, I’d expect to see all Thunar windows gone, etc, but with xfwm4, I can’t see a difference in what my desktop looks like in XFCE nor can I detect anything that’s not working (i.e. now that I killed xfwm4).
Request information as to how to troubleshoot the problem.