You could ring your bank and let them know before hand so it doesn’t trigger fraud protection.
I split money between two banks hoping a lesser sum would be easier. The first bank I rang to do a transfer thinking it would be easier than doing from the app, but loads of questions of which some were downright stupid. It still ended up going through the fraud dept for further checks!
The 2nd bank I visited in person, which was alot easier and no issues with money going through.