I found and fixed an easy bug in the Payline payment app for Payplans:
in the setting form payline.xml , the "Live" option param name is isProduction

in the payline.php
Params vars are defined as

$inProduction 	= $this->getAppParam('inProduction', false);

('in' instead of 'is')

For this reason, the 'live' option is missed, getting always the default value: false.
This makes the plugin work in test (homologation) environment, but it fails in production (where it never gets true)
Changing

$inProduction 	= $this->getAppParam('inProduction', false);

to

$inProduction 	= $this->getAppParam('isProduction', false);

every time it appears in the code in payline.php fixes the issue.
(Eaysy fix)