Why can't I update 'Add notes' Field Deluge name

Why can't I update 'Add notes' Field Deluge name

Every time I try to update the field deluge name for an 'Add Notes' field... it does not save and reverts back to the default name (e.g. plain, plain1, etc)

Is this a known issue? or is something else wrong?  (I'm beginning to question if Zoho Creator app is production ready since things like this shouldn't be happening  (and within my first 30 mins using the tool)) #gettingworried