And after some updates no fix for this :-((
Version 1.3.0 was the last stable version for the subscription up/downgrade at checkout.
And even 1.4.0 don’t fix it.
Same issue here.
With Mollie plugin version 6.1.0 there’s no problem.
Running WP 5.7.1 and Woo 5.2.2
Upgrading to a higher Mollie version results in the payment process is not starting after checkout.