RAX43 drops connection to readyshare

My Netgear RAX43 router will drop the connection to a PC minutes after being connected. The PC will still be able to access the Internet and other PCs on the network but won’t be able to access the network share readyshare or the routerlogin page. Nor will it be able to ping 192.168.1.1. Windows File Explorer pops up an error message saying that an error occurred reconnecting to readyshare because the local device is already in use. The PC shows the same IP Address, mac address and IPv6 address. Yet the router doesn’t recognize it as the same PC. The issue occurs whether I reserve an IP address or not on the router’s Lan setup settings. I am able to reconnect to readyshare if I manually change the IP Address on the dropped PC. I just started having this problem recently, it worked fine for a couple of years. The router has the latest firmware and Windows PCs are also updated. I have corrected all the recommended settings on my PCs. For example, enabled SMB v1, disabled SMB security signature, allow network sharing, disable password protected sharing, enabled insecure guest logons, enable NetBios, etc. Are there any incorrect settings on the router that may causing this problem? I am afraid that buying a new router will not solve the issue if Netgear routers are now incompatible with Windows 11.