OVPN over TCP - tcp-nodelay

[mumin50]

Hallo

I already made a topic about my ovpn problems https://forum.pfsense.org/index.php?topic=77193.0
Sorry if someone will think that i double myself but now i think it should be in this part of forum
and i don't have a clue how to move it

Small question I have to use TCP for TAP tunel (no other option)

It is working ok but
1)slow - it is not responding like i would like
I tried to use tcp-nodelay option but it causes me
May 20 11:48:38  openvpn[35938]: Exiting due to fatal error
May 20 11:48:38  openvpn[35938]: Assertion failed at helper.c:533
Someone know how to fix it?

2)When i started uploading a file my WAN is transferring 50Mbps where my bridged interface is only 25Mbps… (look attachment )
Any clue why this is happening?