@user2100 I am so sorry for misunderstanding 
Please accept my sincere apologies!
Unfortunately, there is no option to not open Chat Bubble automatically.
I absolutely agree that this feature would be really useful, and we have such a request on our Wishlist. Please vote for this feature to get a notification upon its release here - Have chat not open automatically after time trigger - #2 by Helga
If any questions come up, please feel free to contact us. We’ll be more than happy to help!
Have a nice day 