# Base recovers from congestion-related transaction-inclusion delays

> Transactions could remain pending longer during congestion, and Base changed mempool capacity to improve inclusion speed. This temporarily degraded execution reliability for canonical-bridge-related transactions.

- URL: https://riadefi.com/on-chain/2025-10-18-coinbase-bridge-base-mainnet-transaction-inclusion-delay/
- Type: Market stress
- Stage: Recovery reported
- Evidence: confirmed
- Materiality: material
- Event date: 2025-10-18
- Version: 1, published 2026-08-22 (first published 2026-08-22)
- Advisor-relevant: yes
- Affects: Base canonical bridge (protocol)

## What happened

Periodic congestion on Base Mainnet delayed transaction inclusion from October 17 into October 18. Base increased mempool size and reported the incident resolved.

## What changed

Transactions could remain pending longer during congestion, and Base changed mempool capacity to improve inclusion speed. This temporarily degraded execution reliability for canonical-bridge-related transactions.

## What did not change

The official record did not report a bridge exploit, asset loss, failed finality, or a change to bridge custody or withdrawal contracts.

## Confirmed

- Base began reporting periodic congestion and delayed transaction inclusion at 19:27 UTC on October 17, 2025.
- The incident affected the Base Mainnet transaction pool.
- Base increased mempool size and marked the incident resolved at 03:34 UTC on October 18.

## Still open

- Whether the mempool increase fully addressed recurrence under comparable congestion.
- Whether any bridge transaction exceeded an applicable client timing tolerance.
- The retained status surface is not treated as a complete historical incident archive.

## What it means for an advisor

- Review transaction-expiry, resubmission, and pending-state monitoring procedures for Base bridge activity.
- Record congestion and mempool capacity as operational dependencies without treating the resolved event as a permanent bridge restriction.

## Sources

1. [Delayed Transaction Inclusion](https://status.base.org/incidents/gvlvywy8dgfj) · Base Status · 2025-10-18


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Published by Ketju Research on RIADeFi (https://riadefi.com). Educational research for financial professionals; not investment, legal, tax, or compliance advice.