Voice memo stops recording after 5 mins

Had a problem tonight with Voice Memo. I started to record and interview and it stopped after 5 mins. I only noticed half way through the interview (30 mins) and by that time it was too late to go back! Very frustrating. Im not sure that force quitting or reisintallng app makes a difference - has anyone else had a similar issue? If so, what did you do. OS = Catalina