Keep pmpro_next_payment_date() from using the Stripe API.

my_disable_stripe_api_next_payment_date.php

/**
 * Keep pmpro_next_payment_date() from using the Stripe API.
 * Instead, the next payment date will be calculated based on
 * the date of the last order in PMPro.
 * This will be inaccurate in some cases with regards to trials,
 * but avoids issues where Stripe is giving the wrong "next payment"
 * date when payments fail.
 */
function my_disable_stripe_api_next_payment_date( $next_payment_date ) {
	// remove this filter which may run later
	remove_filter('pmpro_next_payment', array('PMProGateway_stripe', 'pmpro_next_payment'), 10, 3);

	// return the default payment date calculated
	return $next_payment_date;
}
add_action( 'pmpro_next_payment', 'my_disable_stripe_api_next_payment_date', 1 );