@Clive_A The only remedy is to restart the ER605 or disable/re-enable the OpenVPN service on the router itself. I do not understand why you think this is a client side issue?

@laurentiu907 I am having the same issue with OpenVPN on ER605 v2.0 as standalone, firmware 2.3.0 build 20250428. All clients are Windows 11 running OpenVPN Connect. OpenVPN server on the router...