Metrics breaks the PM2 on Node.js v24

[Igloczek]

pm2/io is crashing the whole app process, forcing the app to restart, just because the metrics logic is failing

app-1  | {"level":30,"time":1756732462503,"pid":143,"hostname":"47458b7faa29","msg":"Server listening on http://0.0.0.0:3000"}
app-1  | TypeError: Cannot read properties of undefined (reading 'toFixed')
app-1  |     at Object.handler (/usr/local/lib/node_modules/pm2/node_modules/@pm2/io/build/main/metrics/eventLoopMetrics.js:68:41)
app-1  |     at Timeout._onTimeout (/usr/local/lib/node_modules/pm2/node_modules/@pm2/io/build/main/services/metrics.js:60:39)
app-1  |     at listOnTimeout (node:internal/timers:608:17)
app-1  |     at process.processTimers (node:internal/timers:543:7)
app-1  | 2025-09-01T13:14:23: PM2 log: App name:server id:1 disconnected
app-1  | 2025-09-01T13:14:23: PM2 log: App [server:1] exited with code [0] via signal [SIGINT]
app-1  | 2025-09-01T13:14:23: PM2 log: App [server:1] starting in -cluster mode-
app-1  | 2025-09-01T13:14:23: PM2 log: App [server:1] online
app-1  | {"level":30,"time":1756732465087,"pid":155,"hostname":"47458b7faa29","msg":"Server listening on http://0.0.0.0:3000"}

To reproduce, just start any app and let it run in the background for about 2-3 minutes, it will eventually start crashing.

Breaks on Node.js v24.7.0, works fine on Node.js v22.19.0 and older ones.
Tested on both PM2 v5 and v6.

[Unitech]

Thanks for reporting, inspecting