BBC micro:bit Espruino v2.05 quite unstable?

Here are the results of process.env and process.memory()

>process.env
={
  VERSION: "2v05",
  GIT_COMMIT: "990dac35",
  BOARD: "MICROBIT",
  FLASH: 262144, STORAGE: 2048, RAM: 16384,
  SERIAL: "a7508229-3abf344e",
  CONSOLE: "Bluetooth",
  MODULES: ""
 }
>process.memory()
={ free: 276, usage: 24, total: 300, history: 11,
  gc: 0, gctime: 2.99072265625, blocksize: 12, "stackEndAddress": 536884560, flash_start: 0,
  "flash_binary_end": 258580, "flash_code_start": 260096, flash_length: 262144 }
>