Please Help. My IOS Wallet gives error since transfer from Coinbase.

[SchadiTa]

Hi all,
I desperately need some help. Some days ago i transferred some of my bitcoins from my coinbase app on my android to my Core Bitcoin wallet on my Iphone. (old native wallet that was in the app store)
Anyway, after i have sent the send button on my coinbase account to transfer my bitcoins the Bitcoin app on my iphone showed the following message "Wallet decryption error, check phone for unwanted programs". Now there is Z can just read the message and everytime i open the, the message comes up.
After a long search for my passphrases tried to recover my Wallet with bread wallet on my iphone.
After the app synced i saw that there was one tx that i didn’t do or maybe got intercepted?
initally i had approx. 0.42 btc on my wallet then i transferred my coinbase btc of 4.58
But the last tx shows me that 4.9 where sent somewhere. Can someone please please please help me.
Where are my funds and why is this transaction there?
What i can maybe add is, i had to try 3 times to send the funds due to the fees. Had to adjust amount each try.

https://blockchain.info/address/874d19683fe81498806e5cbe4c6555f9b9975b57

Thanks for your help

ST

[AgentofCoin]

Enter your 12 word mnemonic into a desktop wallet like electrum and see if your funds are there.
https://electrum.org/#download

I don't know about using breadwallet on your iphone since I have heard about others having issues.

Also, please link me to the iphone wallet you are using specifically. Is your iphone jailbroken?