The staged changes were not lost or stuck. The platform rejected them because the requested size (5120 MB) is above the Hobby plan's 5 GB (5000 MB) volume cap. The Agent used binary conversion (5 × 1024 = 5120), which overshoots the limit by 120 MB, so every apply attempt gets the same refusal. Your volumes are already at 5000 MB, which is the maximum on Hobby. You can dismiss the failed changes from the Deploy bar in your dashboard.