Go look at the subreddit of any of the major exchanges and they all regularly have stories of locked funds. Given the scales it would be far more likely there.
That's not a natural state of banking though that's a issue with your country. I have accounts at 4 different banks in Australia and regularly transfer funds between them without issue(I think my cap for instant transfer is around $5k though above that is usually only a few hours). Canada had a similar system(interac payments).