ErrorHandler removes other notice messages in add-payment-method page

[gedex]

Describe the Bug

This JS, enqueued in add-payment-method page, clear out all notices added via wc_add_notice():

woocommerce-paypal-payments/modules/ppcp-save-payment-methods/resources/js/add-payment-method.js

Lines 50 to 55 in f628cff

	} ).then( ( paypal ) => {
	const errorHandler = new ErrorHandler(
	ppcp_add_payment_method.labels.error.generic,
	document.querySelector( '.woocommerce-notices-wrapper' )
	);
	errorHandler.clear();

specifically

errorHandler.clear();

Notice appears for a second — due to the setTimeout — and then cleared.

To Reproduce

Use following test to create a custom error notice (in a real case, this could be from another plugin):

add_filter( 'woocommerce_add_payment_method_form_is_valid', function() {
	wc_add_notice( 'Test custom error notice', 'error' );
	return false;
} );

Go to add-payment-method page and see it appears for a split second.