I just did a simple test

log.debug({title: 'Function X', details: '** Finish **' });

and change it to

log.debug({title: 'Function Y', details: '** Finish **' });

but when the script runs it shows on the log

Function X

even though I can see

Function Y

on the script via UI

It's probably the caching issue thats been floating around here in conversations for weeks if not months.