I’m not seeing any problem saving data in textareas. Going to need a bit more information.
Is this just a textarea or is it nested in a repeater or flexible content field? Or is it a field that is conditional? Basically any more information you can give me about the textarea, field name, etc.
Is there a large amount of data besides the textarea that’s being submitted? Is there a large number of fields? or does this happen with all textareas?