Depending on the provider and operation (especially overwrites and listings), object storage can behave like an eventually consistent system, so you may not see the newest state immediately. Design for it by avoiding overwrites (use unique keys/versioning), using retries with backoff, and not relying on immediate “list shows everything” semantics.
Expanding on the short answer — what usually matters in practice:
A tiny example (an explanation template):
// Example: discuss trade-offs for "object-storage-consistency:-why-can-you-sometime"
function explain() {
// Start from the core idea:
// Depending on the provider and operation (especially overwrites and listings), object stora
}