Soft tub 12 hour timer problems

I’d really appreciate it if anyone has troubleshooting ideas.

We’ve had a soft tub for 3 years now and always used the 12 hour timer to keep it from running from roughly 9 pm to 9 am.

Lately, it’s been turning on consistently at around 530 AM, but only for 10 min, not for a full cycle. But I don’t want it running at all this early. Strange. Any ideas? Thanks!!