"PR_CONNECT_RESET" using Firefox on Sharepoint with Loadbalancer

HResa 21 Reputation points
2021-08-13T11:13:14.533+00:00

Hello, we use a Sharepoint 2019 on Premises farm (minirole with two web servers and two app servers, ha-proxy load balancer, https terminated on the web servers) with different browsers. With Firefox (currently the ESR version) we keep getting the error message "PR_CONNECT_RESET"

It is impossible to reconnect with F5, but if we have an open tab on another side of the sharepoint, or if we copy the address bar and open it in a new tab, we can continue working.
What could be the reason for this error message?

Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
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SharePoint Workflow
SharePoint Workflow
SharePoint: A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.Workflow: An orchestrated and repeatable pattern of business activity, enabling data transformation, service provision, and information retrieval.
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