It's just Chrome's error. When a project has many blocks, Chrome does not load blocks. It broke in one of the last Chrome updates. Also, other chromium-based browsers do not work. In the past, projects were loaded without problems, Chrome has a problem for about a month.
Open a large project, several thousand blocks. Then, from the designer, try to go to blocks. There will be a message that the browser is not responding.
There is a topic somewhere in the community where I tested several browsers. For me, only Firefox opens the block screen correctly and quickly. I did not introduce any changes in the projects, the computer hardware was the same. Kiefys chrome used to open blocks, no longer opens the same blocks. This cannot be a coincidence.
Thanks for all the Replies form the Power Users...
Based on the feedback, looks like there is something going on with Chrome, although it would be great if we can have a clear answer for the folks like me...
Since Firefox is working for me, is there a trick for addressing the scrolling issue, or I just need to live with it.