pipecat/changelog/4149.fixed.md

• Fixed ServiceSwitcher with ServiceSwitcherStrategyFailover incorrectly triggering failover when ErrorFrames from other pipeline stages (e.g. TTS) propagated upstream through the switcher. Previously, any non-fatal error passing through would be misattributed to the active service and trigger an unwanted service switch. Now only errors originating from the switcher's own managed services trigger failover.