Can you share some of your Flow runs?
How often is this used?
I would really love to see the Activities tab of your Agent to see what its been doing and (how well it is doing it), you can also look at the Analytics to see what its doing and more details related to its use.
Its possible its getting overloaded, or you are running out of Actions (depending on a flow usage)
So when you say its disabled, when it is, that is when I would want to see the Flow Activities for any Agent Flows, Power Automate for Copilot flows etc.
I would immediately check the connections it is using, before you re-install it.
I would also look at the usage based on any Ai it might be doing, pay as you go, or your overall user usage
it would so much easier to see some picture if you can share when its down, all the above it will help me help you as well as the Agent, its topics or automations etc.