[12.x] Only call the ob_flush function if there is active buffer in eventStream #55141
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When ob_flush() is called without first calling ob_start(), it fails saying there's no active buffer. To avoid this issue, we must check the buffer level before flushing it.
tonysm
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Fixed
Context:
When ob_flush() is called without first calling ob_start(), it fails saying there's no active buffer. We need to check the buffer level before flushing it to avoid this issue. This is also how Livewire does it.