[6.10.0] Scripts at boot time will not executed (e.g. Auto-Start Encryption)

My array is encrypted and automatically decrypted at start time. For this the keyfile is loaded from my Diskstation via ftp. 
 
I have created the scripts according to these instructions.
https://forums.unraid.net/topic/61973-encryption-and-auto-start/?do=findComment&comment=648148

Under Unraid 6.9.2 this works fine. Under Unraid 6.10.0 the scripts are unpacked but not executed. If I run the script manually the script works. 

Here is my exact description of the problem:
https://forums.unraid.net/topic/61973-encryption-and-auto-start/?do=findComment&comment=1128018

The scripts are located in the following directory
/usr/local/emhttp/webGui/event/starting/fetch_key
/usr/local/emhttp/webGui/event/starting/delete_key
/usr/local/emhttp/webGui/event/stopped/fetch_key

Script (fetch_key)

Regards 

Thorsten