We played only two hands against East.
E-W employed BBO bidding card,their system is " Strefa Pro" ,I know this is a early version of polish club.
First hand :
1♥ is explained by their BBO convention card,but there is no explanation on 4♣,so I let East explain,now you see that East explained 4♣ as "Try to guess like my partner", and then nothing to say.
Both of my partner and me still treated them politely.
Second hand :
now you see that final result is 3♦E -8.
There are misunderstandings between them,after 6 round,East claimed -8,and nothing to say ,then left table at once.
We have kept polite to them,they also kept silent, nothing to say, I am wondering why they did such thing,how to deal with this matter?