Glitches in LLM Tracing Traces Interface: Spans Not Forming Tree View

I've been seeing some odd glitches in the LLM Tracing Traces interface. I'm having spans come through correctly — in this case, 4 individual spans that share a trace_id. I see the 4 spans in Arize, but in the trace screen the spans are not collected into a tree view. I saw this on several traces last night, and by today they were appearing normally. A new trace I sent this morning is showing the same glitch. (Screen caps in thread)