Unity Bolt Timer doens't work suddenly

I’m using Unity version for 2020.3.20f1. And using Bolt version 1.4.15.

In my project, Timer doesn’t work. It was normal before 7 days ago, but today, the flow stops on Timer unit.

Is there anyone who have same problem with me? And anyone who can help me to solve this problem?

Are you getting any errors? Is your Start event set as Coroutine?

Timer and Cooldown have built in coroutines or at least the used to.