Bricks 1.7 should actually have fixed the lag problem. This is probably the most extensive thread on the subject and we’ve only had one reaction to it so far - apart from yours:
We’ll have to wait and see what happens for other users and whether they also still have problems.
I think that in the next few days more users will be able to report whether they are still struggling with lags. 1.7 is only a few hours old…
Until then, I would consider this report to be solved/no bug for the time being. If you have concrete information on how to reproduce the lagging problem or can provide a template, please do so by emailing help@bricksbuilder.io or in the thread mentioned above.