I have upgraded my project to spring boot 2.6.11 and spring cloud 2021.0.4. After that, the parentId disappeared from the log.
I am using logback to logging purpose. So there is a way to display it? I added a logging pattern but it didn't change anything:
logging.pattern.level=%5p [${spring.application.name:-},%X{X-B3-TraceId:-},%X{X-B3-SpanId:-},%X{X-Span-Export:-}]