Still got Connection closed before full header was received in Real Device

[Imesh7]

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Issue Info

Info	Value
Platform Name	e.g. flutter / ios / android
Platform Version	e.g. 1.5.0 / 12.0 / 9.0
Dio Version	e.g. 2.1.0 / 1.0.17
Android Studio / Xcode Version	e.g. Android Studio 3.3.2 / Xcode 10.2.1
Repro rate	e.g. all the time (100%) / sometimes x% / only once
Repro with our demo prj	e.g. does it happen with our demo project?
Demo project link	e.g. link to a demo project that highlights the issue

Issue Description and Steps

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got error connection closed before full header was received in real device

is this issue in flutter side or dio package?

[Imesh7]

@AlexV525 I didn't know why you have closed this issue?
is this issue duplicated or solved?

[AlexV525]

See #1607.