attached file size problem

[akanarya]

Hi,

I have an High Availability setup with 2 opnsense nodes, which are direclty connected to Draytek VDSL router.
My opensenses are at latest version.
I have been struggling with this problem for a long time, so i have to disable packet filtering to work with my other tasks. Now i want to give it a try on more.
Infact it was difficult for me to find out what is happening but at last i know the problem but dont know the solution.
Problem; when i try to send an email with an attachment, or syncing dropbox, or getting whatsapp images from my desktop inside the lan i  cannot send, sync or get the files if it is bigger that a certain size.
I measeured before but dont know exact number for now but it should be about 45kilobyte.
There is nothing blocking in firewall log.

If i disable packet filtering everything works fine.
I do lots of things which i dont remember now, but a few things;
changed the rules state types from keep to sloppy.
Disabled interface scrub from normalisation.

If I dont resolve the issue again i will shut the packet filtering off forever and i will only use opnsense boxes for
other uses; ntp, proxy etc,... which i wont prefer.

Regards,