Hello.
For the most stable operation with both Stripe and PayPal, we recommend using AbanteCart 1.4.4 together with the latest payment extensions.
Regarding "Act on Behalf", this functionality is not related to the PayPal onboarding process. We have never provisioned or implemented "Act on Behalf" to allow merchants to take payments through PayPal on behalf of another account. Therefore, any onboarding or account connection changes would not affect this functionality.
For the most stable operation with both Stripe and PayPal, we recommend using AbanteCart 1.4.4 together with the latest payment extensions.
Regarding "Act on Behalf", this functionality is not related to the PayPal onboarding process. We have never provisioned or implemented "Act on Behalf" to allow merchants to take payments through PayPal on behalf of another account. Therefore, any onboarding or account connection changes would not affect this functionality.

