Hello wandererfan, greetings to the Community!
Finally I found something that affects the malfunction.
If from the TechDraw preferences I set A4 as the default page/format, and then set/change the Template parameter from the properties to a format greater than A3, then the problem arises.
If from TechDraw preferences I set A0 as the default page/format, and then set the Template parameter on smaller formats from the properties, the problem seems to disappear, and everything works perfectly, even if I create a new page with an A0 Template, the malfunction does not occur.