Since the 'moneyorder' payment method doesn't display the behavior you describe, I'll suggest that you review the changes you've made to your pay-later method. I'll PM you with my direct email address for that log.
I have this exact same issue with a money order clone using bootstrap 3.5.0, Zen 1.5.8, PHP 7.3 & OPC 2.45. I am also using Square Web 1.04 so I have set no-update, but it doesn't matter the issue persists on refresh & update as well.
I have this exact same issue with a money order clone using bootstrap 3.5.0, Zen 1.5.8, PHP 7.3 & OPC 2.45. I am also using Square Web 1.04 so I have set no-update, but it doesn't matter the issue persists on refresh & update as well.
Thanks for your hard work =)
~Melanie
If you enable the OPC debug output and send me (via direct email) the resultant file, I'll give it a look.