Another game addicted partner

My partner loves phone games, console games...any games. He just loves them and gets addicted to playing them. We’ve had trouble at points where he’s straight up spent money on really stupid mobile games and had monthly subscriptions with games but worst of all he does not time keep his gaming very well at all...it can often be quite rude on his part because we will be cooking dinner or eating dinner and he just won’t put it down, going downstairs in the morning for a coffee/breakfast, still glued to his phone playing games. He can and will spend absolutely hours gaming and it can be days even weeks before his addiction to a game or games dies out and he starts to get back to reality. It’s even affected our sex life, I’ve walked in, in lingerie he’s said barely anything and continued gaming. We’ve got the spending money on games sorted and banished but he is going to be a first time dad in December, he’s excited and that’s great but he has a problem that I’m worried will be one that causes mass arguments when the baby is here. I don’t want to confront him over it because I’m scared that I’ll be almost putting a halt or dampener on his favourite thing, I can see it de-stresses him, he’s passionate about it and pretty damn good at gaming. How do I go about this without bursting his bubble in a sense? I love that he games but not for the longevity he does it, sad thing is I have confronted this problem before and always goes back to the same thing.