Double-click on the "From" or "Data Store Read" block for the first time, it will lag for a long time

When I open a model and double-click on the "From" or "Data Store Read" block for the first time, it will lag for a long time before popping up a window. I found that there are many custom libraries in my model, and these custom libraries enable "Allow library block to modify its contents".

Is it because opening the model and double clicking on the 'From' block for the first time will trigger the initialization of these custom libraries, causing them to lag for a long time? If so, what is the solution to this problem