My Short Japanese Maple Tree finally start growing after 10 years

We have two Japanese Short Red Maple trees, one of them growth up nicely and huge, but this one have never growth one inches for the past 10 years. But finally, last year, she start growthing up and getting lot of red maple leaves. I dont know the reason why she is in sleeping mood for ten years? but i am happy finally it start growthing

Wow. it really eat insects- the flesh eating plant caught a fly