vercel logs returns duplicate entries when there are more than 50 results and --limit > 50

vercel logs --since <window> --json --limit N returns duplicate entries once there are more than 50 logs in the time window. The first page (50 records) is fetched correctly; every subsequent page returns the same first page again. The CLI faithfully accumulates duplicates until --limit is reached.

The first 50 results get duplicated over and over until they fill the --limit

Minimal reproduction

Depends on the actual number of logs in your time window

# Window is small enough to fit in one page → no duplicates
$ vercel logs --since 7min --json --limit 100 \
  | awk '{n++; u[$0]++} END {print "total:", n; print "unique:", length(u)}'
total: 28
unique: 28

# Window crosses the page boundary → 50 unique entries returned twice
$ vercel logs --since 10min --json --limit 100 \
  | awk '{n++; u[$0]++} END {print "total:", n; print "unique:", length(u)}'
total: 100
unique: 50

# Actually any sufficiently large --since window is enough to reproduce this
$ vercel logs --since 12h --json --limit 100 \
  | awk '{n++; u[$0]++} END {print "total:", n; print "unique:", length(u)}'
total: 100
unique: 50

Duplicates are byte-identical — same id, same timestamp, same everything.

Expected behaviour

The API should return the next page of results when ?page=N is incremented, and the cli should return distinct logs (if there are more than 50 logs, --limit 100 should return between 50 and 100 distinct logs)

Assumption about the root cause

The request-logs endpoint (/api/logs/?page=N&...) appears to ignore page N and returns the same first page each time while still reporting pagination.hasMore: true. The CLI loop that drives this in fetchAllRequestLogs calls fetchRequestLogs(..., { ...options, page }) with page = 0, 1, 2, ... and trusts response.pagination.hasMore. The pagination logic in the CLI itself looks correct; I suspect the server side is the issue.

https://github.com/vercel/vercel/blob/5b4ece0b528756012c21da9086ac8197eb134cfa/packages/cli/src/util/logs-v2.ts#L243-L272

Environment

• Vercel CLI: 53.1.0 (also 53.3.2)
• Node: 22.x
• macOS