Exporting docker_events in splunk_hec to Splunk Enterprise results in 400 Bad Request

[flands]

Describe the bug
Exporting in splunk_hec to Splunk Enterprise results in 400 Bad Request

Steps to reproduce

• Deploy a fluent-bit Docker container with input docker_events and output forward
• Configure OTelCol 0.24.0 to receive fluentforward and export splunk_hec to Splunk Enteprise 8.1.4

What did you expect to see?
Data in Splunk Enterprise

What did you see instead?
400 Bad Request

What version did you use?
0.24.0 (no issues with 0.23.0)

What config did you use?
Config: (e.g. the yaml config file)

Environment
OS: Docker on MacOS
Compiler(if manually compiled): (e.g., "go 14.2")

Additional context
Possible regression due to #3036?

[dmitryax]

The 0.24.0 has a known bug fixed here f1ee616
Can you try the latest build instead?

[atoulme]

Is this a dup of #3180?

[github-actions]

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[dmitryax]

The bug was fixed in #3032