save() not working on the micro:bit

If I use espruino 1v86 on my microbit you get this error when calling save:

Erasing Flash...
Writing...
ERROR: Too big to save to flash (244 vs -4 bytes)
Deleting command history and trying again...
Erasing Flash...
Writing...
ERROR: Too big to save to flash (163 vs -4 bytes)

however if I use espruino 1v85 I can save files all day long. for 1v86 i even enabled the minification in the web IDE which said it minifed from 41bytes to 8, this still didnt allow the save in 1v86, only works in 1v85.

EDIT: If i use any form of minification with 1v86 it fails because it changes things like show(1); to ho(1);