diff --git a/components-rs/ffe.rs b/components-rs/ffe.rs
index 0812c8c5cd..76f3b52340 100644
--- a/components-rs/ffe.rs
+++ b/components-rs/ffe.rs
@@ -215,6 +215,7 @@ fn result_from_assignment(assignment: Result<ffe::Assignment, EvaluationError>)
                 allocation_key: Some(assignment.allocation_key.as_str().into()),
                 reason: match assignment.reason {
                     AssignmentReason::Static => REASON_STATIC,
+                    AssignmentReason::Default => REASON_DEFAULT,
                     AssignmentReason::TargetingMatch => REASON_TARGETING_MATCH,
                     AssignmentReason::Split => REASON_SPLIT,
                 },
diff --git a/components-rs/sidecar.h b/components-rs/sidecar.h
index eb0b5be058..27edede5e9 100644
--- a/components-rs/sidecar.h
+++ b/components-rs/sidecar.h
@@ -200,6 +200,7 @@ ddog_MaybeError ddog_sidecar_session_set_config(struct ddog_SidecarTransport **t
                                                 ddog_CharSlice language_version,
                                                 ddog_CharSlice tracer_version,
                                                 uint32_t flush_interval_milliseconds,
+                                                uint32_t retry_interval_milliseconds,
                                                 uint32_t remote_config_poll_interval_millis,
                                                 uint32_t telemetry_heartbeat_interval_millis,
                                                 uint64_t telemetry_extended_heartbeat_interval_millis,
diff --git a/ext/sidecar.c b/ext/sidecar.c
index 860db78e9d..2dd1bd81dc 100644
--- a/ext/sidecar.c
+++ b/ext/sidecar.c
@@ -110,6 +110,8 @@ static void dd_sidecar_post_connect(ddog_SidecarTransport **transport, bool is_f
                                     php_version_rt,
                                     DDOG_CHARSLICE_C(PHP_DDTRACE_VERSION),
                                     get_global_DD_TRACE_AGENT_FLUSH_INTERVAL(),
+                                    // trace send retry interval; 100ms matches libdatadog's prior default
+                                    100,
                                     (int)(get_global_DD_REMOTE_CONFIG_POLL_INTERVAL_SECONDS() * 1000),
                                     // for historical reasons in seconds
                                     get_global_DD_TELEMETRY_HEARTBEAT_INTERVAL() * 1000,
diff --git a/libdatadog b/libdatadog
index 6760faaeed..c79d783f79 160000
--- a/libdatadog
+++ b/libdatadog
@@ -1 +1 @@
-Subproject commit 6760faaeeda1cfcf634410105f93cf7149265592
+Subproject commit c79d783f79f4a2d1e637906f3323600c6e2b5b17