I have 0.0866 bitcoins in my bitpay wallet on my
Phone and they have just vanished. I made 2 small transactions the past 12 hours. Both about 10 to 15 dollars

There is no pending transaction for the rest of my coins
The balance is just gone.

https://www.blockchain.com/btc/address/18RyyhjvxVVJWPE1rvsfQpWNRcCbaWrTwc

This appears to be the transaction where my coins are missing but it is not showing up in my wallet.

https://imgur.com/a/x6RETeG

What can I do? And how could this have happened?

Thanks for any help.