It looks to be a bug. We, forum users, would not be able to help you at all for a bug. You deserve Katalon developer involved.
Do you have a payed license?
If yes, you should raise a Bug ticket at
as Katalon team may not read your post above. @Jass wrote at ERROR c.g.k.c.s.impl.WebSocketServiceImpl - Web socket connection closed due to BufferOverflow raised by Tyrus client. [It might be realated to @SetUp, @TearDown in Katalon] - #17 by Jass
the forum support is voluntary and pretty much relies on our community users to help each other. There is no a specific person in the Katalon team to be accountable for providing support on Forum. As a KSE and KRE user, you can support a Zendesk ticket for better support as we have dedicated people there.