Yep – I’m on the developer plan and definitely paying for it, got 7 other projects running on it fine and only my two Strapi environments are the ones running into problems.
I’ll need more input from more database-minded people… but considering on playing with some of the connection parameters like connection timeouts (tcp_user_timeout) etc
Or switch the database out for a different provider and see if that solves it 
Have you had any luck / experience similar / have a plan of attack?