I'm trying to use the PayPal enrolment plugin to get people onto a course. I'm currently in sandbox mode, as mentioned here https://moodle.org/mod/forum/discuss.php?d=171745#p977221 which was linked to on the docs page. https://docs.moodle.org/30/en/PayPal_enrolment
When a learner clicks on the "Send payment via PayPal"l payment button, the browser opens the paypal homepage and NOT the sandbox/payment page. The learner then has to click the browser Back button, then click the "Send payment via PayPal" button a second time. More often than not this will then opens the payment page - but sometimes I have to click Back a couple more times before it finally redirects me to the correct payment page.
I'm seeing this weird behaviour on IE 11 on Windows 7, Chrome on Mac, Firefox on Mac and Windows - basically not a browser or computer issue that I can see.