Codex usage limits seem to be draining unusually fast since 10 May 2026, even with light GPT-5.3 Codex use, while the usage-tracking UI also appears buggy or missing

Same problem, but for me, the issue was since the weekly usage recharge on May 16th I think. Before that, every 20-min task under gpt-5.5 cost about 5% of the 5-hour limit; now it costs about ~25%. Bascially I can see 1% decrease every minute or even every 30 seconds when the context window is full. I used up the 5-hour credit in about 1 hour.