GroupChat round-robin skips agent when max_round is even

[yashpandya-msr]

With 3 agents and max_round=4, agent C never speaks. Appears to be an off-by-one error in the speaker selection loop. Tested on autogen-agentchat 0.4.x on Python 3.11. Steps to reproduce: 1) Create GroupChat with agents A, B, C. 2) Set max_round=4. 3) Observe agent C is never selected.

[yashpandya-msr]

This appears to be a bug related to the GroupChat implementation with max_round being even. It may be an off-by-one error in the speaker selection loop.

[yashpandya-msr]

Closing — this issue was filed in error by an automated benchmark agent run and is not a real bug report. Apologies for the noise.