When using span streaming mode, if an exception occurs during the Anthropic API call, the StreamedSpan is never closed. The `isinstance(span, Span)` check on line 572 only handles the legacy `Span` type. For `StreamedSpan`, `_capture_exception()` sets `span.status = SpanStatus.ERROR`, but since the type check fails, `span.__exit__()` is never called. This results in resource leaks and lost span data when errors occur in streaming mode.

When using span streaming mode, if an exception occurs during the Anthropic API call, the StreamedSpan is never closed. The `isinstance(span, Span)` check on line 572 only handles the legacy `Span` type. For `StreamedSpan`, `_capture_exception()` sets `span.status = SpanStatus.ERROR`, but since the type check fails, `span.__exit__()` is never called. This results in resource leaks and lost span data when errors occur in streaming mode.

In the span streaming path, when a StreamedSpan receives an HTTP response, only a simplified 'error'/'ok' status is set (lines 290-294). The actual HTTP status code is never recorded as an attribute. In contrast, the legacy Span path calls `set_http_status()` which records the status code as `http.response.status_code`. This results in loss of HTTP status code telemetry data when using the new span streaming mode.

In the span streaming path, when a StreamedSpan receives an HTTP response, only a simplified 'error'/'ok' status is set (lines 290-294). The actual HTTP status code is never recorded as an attribute. In contrast, the legacy Span path calls `set_http_status()` which records the status code as `http.response.status_code`. This results in loss of HTTP status code telemetry data when using the new span streaming mode.

In the span streaming path, when a StreamedSpan receives an HTTP response, only a simplified 'error'/'ok' status is set (lines 290-294). The actual HTTP status code is never recorded as an attribute. In contrast, the legacy Span path calls `set_http_status()` which records the status code as `http.response.status_code`. This results in loss of HTTP status code telemetry data when using the new span streaming mode.

In `_sentry_execute_command`, `db_span.__enter__()` and `cache_span.__enter__()` are called, but there's no try/finally block wrapping `await old_execute_command(...)`. If the Redis command throws an exception, the spans' `__exit__` methods will never be called. This causes spans to leak on the scope (corrupting parent-child relationships for subsequent spans) and prevents the spans from being sent to Sentry. The sync version correctly uses try/finally (see `_sync_common.py` lines 151-160).

In `_sentry_execute_command`, `db_span.__enter__()` and `cache_span.__enter__()` are called, but there's no try/finally block wrapping `await old_execute_command(...)`. If the Redis command throws an exception, the spans' `__exit__` methods will never be called. This causes spans to leak on the scope (corrupting parent-child relationships for subsequent spans) and prevents the spans from being sent to Sentry. The sync version correctly uses try/finally (see `_sync_common.py` lines 151-160).

When span streaming is enabled but the span is either ignored or not sampled, `sentry_sdk.traces.start_span()` returns a `NoOpStreamedSpan` which sets `_segment = None`. The code at line 226 does `isinstance(self.graphql_span, StreamedSpan)` check which passes for `NoOpStreamedSpan` (it's a subclass), then accesses `self.graphql_span._segment.set_attribute(...)`. Since `_segment` is `None` for `NoOpStreamedSpan`, this raises `AttributeError: 'NoneType' object has no attribute 'set_attribute'`. This will crash the GraphQL request handling when a span is unsampled or ignored.

When span streaming is enabled but the span is either ignored or not sampled, `sentry_sdk.traces.start_span()` returns a `NoOpStreamedSpan` which sets `_segment = None`. The code at line 226 does `isinstance(self.graphql_span, StreamedSpan)` check which passes for `NoOpStreamedSpan` (it's a subclass), then accesses `self.graphql_span._segment.set_attribute(...)`. Since `_segment` is `None` for `NoOpStreamedSpan`, this raises `AttributeError: 'NoneType' object has no attribute 'set_attribute'`. This will crash the GraphQL request handling when a span is unsampled or ignored.

The `__init__` method initializes `_start_timestamp`, `_timestamp`, and `_start_timestamp_monotonic_ns` twice (lines 280-288 and 290-298 are identical). This is a copy-paste bug that causes `_start_timestamp` and `_start_timestamp_monotonic_ns` to be set twice with slightly different values, as time passes between the two calls. The second assignment overwrites the first, making span start times slightly later than they should be.

The `NoOpStreamedSpan._end()` method calls `record_lost_event()` unconditionally without any guard to prevent duplicate execution. Unlike `StreamedSpan._end()` which checks `if self._timestamp is not None: return`, `NoOpStreamedSpan` has no such protection. This causes inaccurate lost event counting when: (1) `end()` is called explicitly and the span is also used as a context manager (both `end()` and `__exit__` trigger `_end()`), or (2) `end()` is called multiple times.