Riot, a simple fix please. :)
Calling first is the basis of every lane-dispute in normals.
I request that you sync local chat with server via time stamps for the sake of the normals-lane-calling status-quo. Surely it's a simple fix that will indirectly decrease toxicity and disappointment.
How do you expect a team to communicate efficiently if the status-quo relies on a faulty system? It's ludicrous. Poor coding.
SIMPLE. FIX. F@#%.