Operation method 1, file drawing utility-cleaning;

Operation method 2: directly enter the "cleaning" command to enter the "cleaning" page;

At this point, the problem of 1 should be solved. If not, you need to increase the cache space.

Question 2: It is suggested that you enlarge A4 pattern to A3 page for printing, and check whether there are similar problems.

If it still hasn't been solved, I suggest you reinstall the printing program.