why protocol is not showing as HTTP even though we sent http request ?

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why protocol is not showing as HTTP eventhough we sent http request ?

This is my scenario : We are sending the HTTP traffic via proxy and capturing the traffic in proxy device. For some reasons, the protocol is showing as TCP for HTTP request and response , eventhough we send the valid http request via curl. After disabling the allow subdissector to reassemble TCP streams in Edit-> Preferences -> TCP protocol , then the HTTP protocol is displaying properly. But in this scenario, we are not able to export HTTP objects , since it is coming it as multiple segments/chunked .

The main requirement is to export HTTP objects with enabling the "allow subdissector to reassemble TCP streams" option and protocol should display as HTTP protocol.

Any pointers are appreciated .

Thanks,