Strange problem with OTA

[sindrome73]

Hello!! As mentioned, I'm slowly introducing OTA into my nodes.
But I found a strange problem, after having done OTA of a scketch, it's all OK and the node works.
But after 3/4 lack of power supply to the node (for example, lack of electricity, due to bad weather), the node no longer has the scketch inside and to make it work I have to make a new OTA.
A behavior, can anyone help me ???

I write my scene here

• Arduino pro Mini 5v 16Mhz
• Radio nRF24
• For OTA I used MYSController
• FUSE Arduino settings L = 0xF7 H = 0xDA E = 06

Thanks in advance of the Attention

[sindrome73]

Hi, no one knows how to help me