Are you using a “virtual switch“ to make that happen?
If so, try changing to a “simulated switch“ instead. You will have to do something to turn the switch off again, you can use power allowance for that if you want or just turn it off in an automation.
The “virtual switch“ DTH doesn’t have state and something has changed recently which causes this to keep triggering over and over. The simulated Switch DTH does not have this issue.
See the following for discussion of this: