Status changed from New to Fixed
if you alter the custom block parameters, you should reset the custom block to default settings in Building blocks' Edit block dialog.
This way the new parameter name as well as any other changes will take effect immediately.
I was thinking about doing some kind of refresh automatically, but the custom blocks bring a lot of modification possibilities and I think it is contraproductive trying to handle all possible scenarios.
Resetting the block is the simplest and effective option.
Best regards,
Tomas