[ItsM0rty]

Description

After reconnect, a subscribe or unsubscribe request w/ 501 symbols can replay as [1, 1] instead of [0, 1]. That tells the gateway to process the first chunk before the rest of the request arrives.

The fix replays the original chunks and preserves their is_last flags. It clears start when replaying subscriptions so the client avoids requesting historical data again. No new dependencies.

Fixes #143

Type of change

• Bug fix (non-breaking change which fixes an issue)

How has this been tested?

Both mock-gateway regression cases (subscribe and unsubscribe) failed on 0.90.0 and passed w/ the fix on Linux. The tests run w/o a live API key. The reconnect test module skips on Windows.

python -m pytest -q tests/test_live_client_reconnect.py -k preserves_request_batch_boundaries

Checklist

• I have added tests that prove the fix is effective
• git diff --check passes

Declaration

I confirm this contribution is made under an Apache 2.0 license and that I have the authority necessary to make this contribution on behalf of its copyright owner.