OpenVPN shuts off, needs manual turning off and on to restore

Hi team
So for about 5 days now, OpenVPN shuts off randomly. Basically the client is unable to connect with a request timeout error message. Checking if 1194 port is open results in an error.
But as soon as you access the controller, go into the OpenVPN instance, you turn it off, give it 5 seconds and your turn it back on - everything returns back to normal for... almost 24 hours. Then this scenario repeats itself, we go in, solve it, et cetera.
This is what we have on the logs (the screenshot above).
This is happening to about 6 of the 13 controllers we are currently managing. All of them are updated to the latest version and the issue started 2 day before TP-Link issued the latest update.
Let me know if you are experiencing this as well, or if you have some work around. Thank you.
P.S. I don't know why attaching the image sets it up above the text ?!?!
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I'm having a hard time getting the OpenVPN logs. This is the only thing that I'm getting in server.log:
09-18-2025 18:14:34.206 DEBUG [monitor-device-inform-pool-1] [] c.t.s.o.m.d.m.d.p.o.OsgPoeUtilizationHandler(): handlePoeUtilizationInform osgInformBody {"needReply":0,"vpn":{"ipSecs":[],"tuns":[],"openvpn":[{"id":410256073,"userId":1067656855,"userName":"rebeca","infa":1,"localIp":"10.0.200.1","remoteIp":"10.0.200.6","downP":232706,"down":21146731,"upP":254491,"up":139560041,"uptime":8797,"dns":"10.0.200.1, 8.8.8.8"},{"id":410256073,"userId":235042181,"userName":"oana","infa":1,"localIp":"10.0.200.1","remoteIp":"10.0.200.10","downP":75770,"down":6735360,"upP":85344,"up":53215655,"uptime":3336,"dns":"10.0.200.1, 8.8.8.8"}]}}
09-18-2025 18:14:34.207 DEBUG [monitor-device-inform-pool-0] [] c.t.s.o.m.d.m.i.v.VpnStatsInformHandler(): vpn tunnel list size: 0
09-18-2025 18:14:34.207 DEBUG [monitor-device-inform-pool-0] [] c.t.s.o.m.c.l.MonitorLiteCbcService(): <LITE CBC> omadacId fa5217a20cf9c15325575caee1e53255, Category false
09-18-2025 18:14:34.207 DEBUG [manage-inform-work-group-2] [] c.t.s.c.l.m.ReadWriteLockServiceMemImpl(): [lockService]get ReadWriteLock lockName:module:manager:device, businessId:omadac.id:fa5217a20cf9c15325575caee1e53255:device.mac:EC-75-0C-D2-A7-5C
nothing relating to handshake. Where are you getting the logs from?
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@laurentiu907 , from standalone - System Tools - System Log. Or, syslog server will show the same information if configured.
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Yeah unfortunately mine is linked to a cloud controller - no standalone access and the stuff that comes out from the controller is scarce in details.
It's now stable for about 5 hours. :))))
DST is set and updating just fine.
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This is a beta firmware—feel free to test it. This is a beta firmware that fixes the issue on ER605 V2 running 2.2.6, where OpenVPN sometimes fails to connect. A manual toggle of the VPN server/client on the ER605 is currently required to restore connectivity. Please note: this beta build is based on the official 2.3.0 release. Devices running firmware 2.2.6 or earlier will be unable to roll back after upgrading.
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@Ethan-TP after uprgading to this beta i cant connect to my er605 openvpn server
connection timeout
add.
where s wan???
even local connect to my er605 192.168.6.1 fails
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@laurentiu907 I have a V2.0 version with the latest firmware, 2.3.0 Build 20250428 Rel.18967. I think i have updated already because of this problem...
I could change the port but i will have some work to access the remote workers and change the configuration file on each one. And it seems that it would be a temporary fix...
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This is how the uptime looks like (without this beta firmware which I'm afraid to try in production) from what I've read above.
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@YuriyB Are you saying you cannot set the WAN and IP pool or that the beta firmware wiped out those settings? You'll probably have to re-set that and then if the handshake still does not work, re-export the certificate and update the OpenVPN client with it. Please let me know how that goes so I know what to do when I try this ;)
Also, why TCP instead of UDP on your config?
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1. after update and first restart for a few minutes process "openssl dhparam -out" take high cpu usage so i think this beta rebuild ovpn certificate??
2. yes, after update firmware wiped out that setting.
3. new ovpn server and export new certificate it began to work.
and rolled back to official 2.3.0 Build 20250428 Rel.18967 because didnt find any changes.
habit to use tcp on ovpn and udp on wireguard :)))
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Both controllers are now solid for 13 hours each - so this is not confirmed as a fix.
I'm assuming that all others affected are good at least for 13 hours (without user intervention).
Right?
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