Creating custom block starting with % causes block stack error

[bruh-9000]

Expected Behavior

Making a custom block with %anything causes a block stack error

Actual Behavior

Making a custom block with %anything should cause no errors

Steps to Reproduce

Explain what someone needs to do in order to see what's described in Actual behavior above

Steps to reproduce the behavior:

1. Create a new project
2. Make a new block with the label %anything
3. Click “Ok”
4. Click “Cancel”
5. Click on any section

System Details

All

Screenshots