Basebans client index is invalid

[dragokas]

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• I have checked that my issue doesn't exist yet.
• I have tried my absolute best to reduce the problem-space and have provided the absolute smallest test-case possible.
• I can always reproduce the issue with the provided description below.

Environment

• Operating System version: Linux
• Game/AppID (with version if applicable):
• Current SourceMod version: 1.11.0.6648
• Current SourceMod snapshot: 1.11.0.6648
• Current Metamod: Source snapshot: 1.10.7-dev

• I have updated SourceMod to the latest version and it still happens.
• I have updated SourceMod to the latest snapshot and it still happens.
• I have updated SourceMM to the latest snapshot and it still happens.

Description

Not sure how to reproduce.

Problematic Code (or Steps to Reproduce)

sourcemod/plugins/basebans/ban.sp

Line 129 in 3bafc1e

Format(title, sizeof(title), "%T: %N", "Ban reason", client, playerinfo[client].banTarget);

Logs

L 05/07/2022 - 15:06:29: [SM] Exception reported: Client index 14 is invalid (arg 6)
L 05/07/2022 - 15:06:29: [SM] Blaming: sm/basebans.smx
L 05/07/2022 - 15:06:29: [SM] Call stack trace:
L 05/07/2022 - 15:06:29: [SM]   [0] Format
L 05/07/2022 - 15:06:29: [SM]   [1] Line 129, D:\builds\build-sourcemod-msvc12\windows-1.10\build\plugins\basebans/ban.sp::DisplayBanReasonMenu
L 05/07/2022 - 15:06:29: [SM]   [2] Line 268, D:\builds\build-sourcemod-msvc12\windows-1.10\build\plugins\basebans/ban.sp::MenuHandler_BanTimeList