[WORKAROUND] Unable to create string as not enough memory (FlashEEPROM problem)

I reconnected the ESP8266 in order to add process.memory() in the loop and saw that it had been working for hours (11.25597 hours for now). I added process.memory() anyway:

810428 { "free": 122, "usage": 1278, "total": 1400, "history": 1 }
810429 { "free": 122, "usage": 1278, "total": 1400, "history": 1 }
810430 { "free": 122, "usage": 1278, "total": 1400, "history": 1 }
810431 { "free": 122, "usage": 1278, "total": 1400, "history": 1 }
810432 { "free": 122, "usage": 1278, "total": 1400, "history": 1 }
810433 { "free": 122, "usage": 1278, "total": 1400, "history": 1 }
810434 { "free": 122, "usage": 1278, "total": 1400, "history": 1 }
810435 { "free": 122, "usage": 1278, "total": 1400, "history": 1 }
810436 { "free": 122, "usage": 1278, "total": 1400, "history": 1 }
810437 { "free": 122, "usage": 1278, "total": 1400, "history": 1 }