Anyone else's teen regressed in maturity?

[Backtothenineties]

No idea what's going on with son age 15 . Always was mature and sensible until 2 years ago and now seems to be regressing in maturity.
Laughs at immature Tik Toks like trolling people online gaming, thinks it is funny to troll people, has a mindset he wants a high paying job with lots of money not a job he will like and has lost all common sense and I can't really explain but has gone back in years in maturity.
Is this a normal thing?

oh To be 15 again
no cares. No job. Summer days seem endless
my eldest who is 25 and me have the same dark sense of humour and I swear when he was a teen I never thought he’d be a sensible(ish) adult but he’s always had a job since leaving uni, has moved out and always pay his bills - they do grow up eventually