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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@DrAzzy
Sounds like it's down to either I2C (for the screen), or the SD card access.
I assume you've verified that the log files are clean? That would be something to check - if it's being caused by SD card access, maybe you'd see a sign of it there...