All revisions of RTL8156 experience the same issue.
I have tired the following adapters:
https://www.amazon.com/dp/B097N5WJY9 (RTL8156B)
https://www.amazon.com/dp/B08YJ8CLMS (RTL8156B)
https://www.amazon.com/dp/B0BMQRTWHC (RTL8156BG)
I have tried the latest 11.13 driver from the Realtek website yesterday with the same results. Disabling flow control and idle did not help. Had to revert to 11.4.211.2022 again.
High bandwidth downloads (300Mbps+) of a multi-gigabit (4GB+) file via an IKEv2 VPN tunnel result in Chrome sporadically reporting "Failed - Network Error". Both the VPN client and server are capable of 1Gbps. This does not occur when IKEv2 is not used.
As IKEv2 used UDP for transport it likely requires fragment reassembly which I suspect the driver is mangling. The older driver seems to work, so something was broken in the past year or so.
I have tired the following adapters:
https://www.amazon.com/dp/B097N5WJY9 (RTL8156B)
https://www.amazon.com/dp/B08YJ8CLMS (RTL8156B)
https://www.amazon.com/dp/B0BMQRTWHC (RTL8156BG)
Computers:
ASUS Maximus X Code Motherboard - Desktop
Dell Precision 5560 - Laptop
Both running Windows 11.
Intel adapter in desktop doesn't have issue. Realtek adapters do not have issue when used with specific driver version.