Any clockworks experts?

Factual Questions
1

Last night, when I got ready to retire (about 1:20 a.m.), I “wound” the three weights on my cuckoo clock. At about 8 a.m., I got up to feed the cats, and noticed that the weights for the cuckoo and the music box had not descended. The weight to run the clock had gone down the appropriate amount, and the pendulum was ticking over nicely, but the hands on the clock were still showing a few minutes before 1:30.

I manually advanced the hands to 1:30, and thankfully, the music box started. When I advanced the hands to 2:00, the cuckoo also activated. So I finished feeding the cats, then finished advancing the clock until it read the correct time. Then I went back to bed.

At 11:00 a.m. I was awakened by the sound of the clock striking the hour. Can a cuckooo clock maven explain to me what would cause such behavior in this machine?

TIA

2

At its core, it doesn’t really matter if it’s a cuckoo clock or a grandfather clock.

My suspicion is that a gear wheel has come loose from the main shaft after the escapement (That’s the mechanism that regulates gravity’s pull on the weight and the pendulum’s swing and goes tick-tock.) The clock makes its usual tick-tock noise, but the rest of the mechanism isn’t getting driven.

Not really a DIY fix, and when’s the last time the clock was serviced? They do need a bit of cleaning and oiling now and then so it’s probably overdue.

3

I bought it for kaylasmom in the spring of 2017. The music box went out of sync at about the three-month mark, that was the last time the clock man had it.

But it’s back to keeping time now. I hope it doesn’t go out again.