Disable Streaming Argument for Phoenix Collector in Python

Is there an argument I can pass to disable streaming when starting up Phoenix collector with python? it doesn’t appear to be sticky when toggling from the UI

python -m phoenix.server.main serve

I’m running into an error with my traces showing up as incomplete and want to see if that argument would fix the problem. Error message:

Cannot query field 'spans' on type 'Query'.
GraphQL request:6:3
5 | fragment StreamToggle_data on Query {
6 |   traceCount: spans(rootSpansOnly: true) {
  |   ^
7 |     pageInfo {
Stack (most recent call last):