Unfortuantely not a new problem to the MR200 V1, a problem i've been having for years with this device! - there are other threads on this forum about it.
But, its a problem tp-link has fixed in some BETA firmwares yet is a problem which seems to cause tp-link support endless problems.
I contacted support again recently, only to be told they are not aware of this problem!?
The MR200 v1 doesnt passthrough IPSec VPN traffic. Is there anyone out there using the V1 unit who has any thoughts on this?
'161026 beta' did fix the passthrough problems. After upgrading to latest '180502' it stops working again.
Several years ago, checking old emails, tp-link support said they had identifed a problem that meant passthrough didnt work if fast NAT was enabled. They had therefore made a more recent beta from 2017 (which I had been using for a long time) also fixes the passthrough issue but which I have not seen discussed anywhere else on the internet.
I am just fed up of running 'beta' firmwares, its silly there hasnt be a more recent update or better recognition from support that there is an issue. This seems to be a problem that tp-link support dont know how to deal with.