customer got autologged off, after placing order using third party payment module in prestashop 1.7.8.6

[Vishnupriya]

Hi All., 

I m using prestashop 1.7.8.6 version and php 7.4. 

I m using third party payment module. And it was working fine in older version of prestashop. Upgrading into newer version, I m facing issue. 

After placing an order using third party payment module, the use got logged off automatically and redirecting to the prestashop. Instead of going success or failure pages. Have tried many solutions. But no luck. Seems, third party cooking are blocking. 

kind help to resolve this. I want user to be stay signed in, and need to redirect to the respect page. Please help. 

 

Edited March 4 by Vishnupriya (see edit history)