I had the EXACT same problem!
I only fixed it yesterday after a tortureful year of freezing
You might not believe but it the problem is your savegame, im guessing its corrupted somewhere and whenever the game tries to save to that part (records, stuff like that) it will freeze the console.
Try...
btw i feel this a good time to remind you guys that sea of thieves was made by rare, who also made DKC1-3 and DK64, alongside banjo kazooie and conker's bad fur day