No. I have never experienced such a thing. In fact, my 'writing' issue is at the opposite end of that blank spectrum - always too much to write about; & new ideas constantly trying to push their way into my actual writing :)
The fact that people worldwide are reading my books about the ancAu [ancient Australians = aboriginal/indigenous] people is the most success I could have hoped for. The educational/awareness aspect the series gives readers, examples that long-standing negative stereotypes are fading under real knowledge...