ESP8266 LED flashligh sometimes it turns on by itself

tel. Huawei Mate 20 LIte - Android
Blynk Version 2.27.31
My Board
Hello Friends, I would like to ask you if you have had a similar problem.
I control via the Blynk application an LED flashlight via esp8266 01 with relay and 5v power supply from a phone. The ESP is connected to my WIFI router.
In the application I have created a switch with which I can turn the LED flashlight on and off whenever I want, as well as a time timer that turns on the LED flashlight at 21:00. and turns it off at 11:30 p.m.
The problem is that sometimes I see that the LED flashlight and shines during the day and when I see it I turn it off manually through the switch in the Blynk application. For the LED lantern it is not such a big problem for me but I want to create a garden irrigation system with 16 solenoid valves and I am worried that one of the valves will be open when it should not, and will flood the garden.