EH preview not automatically showing what the filter will look like after record

Normally, within EH, the preview window automatically shows what your filter will look like after the user action (e.g. record). Very recently, every single time I change something, the preview window has stopped showing this, and requires me to save and re-launch EH. It even stayed broke once or twice and I lost my entire work and had to start again. Now I have to take a backup, every single time I change something in case this happens again. Has anyone any ideas on how to fix this or what the issue is please?

So it seems that some of my variables are not updating… the conditions are not working, etc… maybe some sort of a cache of previous funtionality. Is there a way to clean the project files?

This is happening to me too