The IBM Cloud console is a heavy single-page app — if it hangs or shows a blank screen, start with a hard refresh (Ctrl+Shift+R). Clear the browser cache and switch to Chrome or Firefox if you're on Safari or Edge. Disable browser extensions, especially ad blockers, which often intercept API calls the console depends on.
This almost always means the IAM token has expired or the API key lacks the right permissions. Regenerate the API key in Access (IAM) → API keys, and double-check that the service ID or user account has the correct role assigned to the target resource group. A 403 with a valid key usually points to a missing policy — check Access policies under your account.
Large file uploads to Cloud Object Storage often fail because of client-side timeouts. Use the IBM COS SDK or the ibmcloud cos CLI instead of the web UI for anything over 500 MB. Enable multipart upload and set a reasonable part size (100–200 MB). Also verify that the bucket's CORS policy allows your origin if you're uploading from a browser app.
Spikes in pod response time usually trace back to node resource saturation. Run kubectl top nodes and kubectl top pods to spot the culprit. If CPU and memory look fine, check network policy rules — overly broad deny-all policies can force traffic through unexpected routes and add tens of milliseconds per hop. Also review whether your pods are co-located in a single zone; spreading them across availability zones with proper topology keys usually smooths things out.