Did you make screenshots of your 19.42 BTC account balance?
Yes, I did. Just searched it, it was 19.67069264 BTC exactly. I was able to withdraw 0.227 BTC a few minutes ago, when my account balance was ~0.25 BTC (I even was not able to fully withdraw this, it says not enough credit, 0.0211 BTC are left on account currently):
https://www.blockchain.com/btc/address/19Zde2uj4MeGNYy37kyVKMkgfFSSGNJByoSo there is some ~19.44 BTC (blockchain fees omitted) missing.