If a Cypress test passes on a rerun, it's tempting to blame Cypress and start planning a migration. Timing and shared-data bugs follow you to a new tool, though, so it's worth finding the cause first.
Look at the first failure
Start with what the failed run left behind, and read what happened around the step that failed. Then check three things in order.
Did the test start in the state it expected? A test can depend on work completed by another test, or on an account an external service left in an unexpected state. Each test should set up its own data, and mutable fixtures need an isolation plan if they're shared.
Is it waiting for something meaningful? Asynchronous app updates can finish after the assertion starts. Replace fixed delays with a wait on what actually needs to finish, such as the request that saves a form.
Is the expected outcome specific? A good browser test verifies a particular visible result after an action, so a reviewer can see what the test established.
Write down the cause and assign the fix. Retries can keep CI moving while you investigate, but they don't explain the failure.
Separate the failure from the migration decision
A migration can be worthwhile for authoring or workflow reasons. Fix or isolate these conditions first, so that any comparison measures the tool rather than a different environment. You don't have to replace the whole suite to try something else, and useful lower-level tests shouldn't turn into browser tests.
Trying a flow in Zerocheck
To compare, take one browser flow and give Zerocheck the same test data and expected outcome in its web app. Review the drafted steps, then break the flow on purpose and read the failure. Each run keeps the YAML that ran with its per-step screenshots and console errors.
Zerocheck doesn't run or convert Cypress tests, so you describe the flow again in plain English. It covers complete browser flows and doesn't do component testing, so it sits alongside your existing coverage.