Outlook is constantly refreshing - what can I do?

Updated to the current version of Classic Outlook, Version 2501 Build 18429.20200, which was supposed to have this issue resolved, but users are still experiencing the same refreshing and closing of emails.

I have the same problem.
works fine with Brave Browser

In case you don't want to clear caches or history, you may try this developer way.

1️⃣ Press Ctrl + Shift + J (or Ctrl + Tab + C in some browsers) to open the Console in Developer Tools.

2️⃣ Click on the Console tab. You will see tons of errors and logs—never mind those!

3️⃣ Copy and paste the following code into the console and press Enter: 

1️⃣ Prevent Page Reload
window.location.reload = [removed_js] {
    console.log("Reload blocked!");
};
window.location.assign = [removed_js] {
    console.log("Navigation blocked!");
};
window.location.replace = [removed_js] {
    console.log("Navigation blocked!");
};

// 2️⃣ Prevent Refresh via Keyboard Shortcuts
document.addEventListener("keydown", [removed_js] {
    if (event.key === "F5" || (event.ctrlKey && event.key === "r")) {
        event.preventDefault();
        console.log("Manual refresh blocked!");
    }
});

// 3️⃣ Prevent Leaving the Page (Back/Forward Navigation)
window.onbeforeunload = [removed_js] {
    event.preventDefault();
    return "Are you sure you want to leave?";
};

// 4️⃣ Disable Console Logs to Prevent Tampering
console.log = [removed_js] {};
console.warn = [removed_js] {};
console.error = [removed_js] {};
console.debug = [removed_js] {};

Done! Now, the browser won't refresh, navigate away, or let you reload via shortcuts.

If you want to undo this, simply refresh the page manually or restart your browser.

Same issue on Chrome using a Mac, this is just annoying. I deleted the cache and cookies 15 days ago, and now it's working bad again. Several teammates had the same issue in our company. I mean, you have a thread of people complaining about the same, with no definitive solution.

I'm having the same issue. Clearing cookies and cache is very annoying as others have mentioned. Hopefully MS can get this fixed soon.