I have not run into that behavior… I’m using a pretty basic implementation of the !input. Which version of Home Assistant are you using?
Also, I have a simplified version of the day-check logic in the latest updated on the blueprint. (Thanks to @123 and @AntonH for the pointers!) Are you using that version?
Sorry you are having trouble! Hopefully we can sort out what’s going on…
EDIT I think I see what you are experiencing now… There is a bug around saving blueprints using the UI that may be related. As a workaround, does the YAML editor work for your needs?