LoRa32 T3S3 - Issue with connection outside

Hi, I have a some problems with my 2 nodes LoRa32 T3S3. When I am in house - I can send messages from node1->node2, node2->node1.
But ... I noticed then sometime when I sending I can see Max Retransmission Reached but message apears anyway on LCD and when I switch node in app I am connected I see messages.

Also sometimes I can see error on LCD (error #7) I know what does means but I don't know how to fix it :(

But ... biggest my problem is - that as I have connection in house - when I left my home and go 20 meters or so - I can not send any message.

I did try on stock antennas and on 17 cm long. So far, no luck
Both nodes set to client - EU 868 frequency

Anyone can help?