Describe the bug: I am using logging support which injects correlation ids (trace, transaction, span). However even after running with 100% sample rate I've not been able to get a single log with a Span ID!
Also "maybe" this could be the reason that I am not seeing any logs in trace waterfall

To Reproduce

1. Install elastic apm agent version
2. Simply allow logging integration (default)
3. Check in your APM

Environment (please complete the following information)

• OS: Linux and Mac
• Python version: 3.9/10
• Framework and version [e.g. Django 2.1]: Should not matter but Sanic v22
• APM Server version: Proprietary Solution
• Agent version: elastic-apm==6.7.1

Additional context
N/A