Studying WLC in Packet Tracer

I've been trying to study setting up a WLC in Packet Tracer, but am running into issues. It's connected to an Access Switch with a trunk port allowing VLANs 40 (Wi-Fi) and 90 (Management). the Management VLAN is the native vlan for the connection.

Whenever I connect the WLC to the Access Switch, everything is fine. But when I open the web UI and do the initial setup (Creating Management interface), it looks like a broadcast storm occurs that causes Packet Tracer to crash. From what I see, Spanning Tree seems to be working fine, but I could be wrong.

Not sure if it's against the rules, but I can also send the Packet Tracer file if needed. I know Packet Tracer has a lot of quirks with Wireless so I'm not sure if maybe it's just a PT issue.