We also starting having this problem starting April 30th, 2019. Transactions from the last 3 days are missing the custom, name item# fields. The custom data is still in the "memo" field, but normally it's in both. This has been working for years for us, and just broke this week, we didn't change anything on our end. We use the Javascript PayPal button like <script async="async" src="https://www.paypalobjects.com/js/external/paypal-button.min.js?merchant=***" data-button="donate" data-name="***" data-quantity="1" data-amount-editable="***" data-currency="***" data-callback="***" data-return="***" data-item_number="***" data-custom="userid=***" data-size="large" ></script> Not only are the fields like name & custom not being populated but the callback URL is also not being called so we aren't getting any IPN message to track the donations!
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