Ad Hoc .ipa for iOS 12.5.8

Hi,

We're having problems starting an Ad Hoc ipa on an iPad with iOS 12.7.7 and 12.7.8, probably iOS 12 in general. The iPad's UUID is added to the certificate. And we don't have problems with iOS versions > iOS 12. Here is the anonymized Console Log:

default  09:05:12.088994+0100  SpringBoard  immediate edge swipe: failed
default  09:05:12.095189+0100  SpringBoard  Icon touch began: <private>
default  09:05:12.096204+0100  SpringBoard  Found a reasonable launch image for <private>, not pre-warming SplashBoard. Load image into the snapshot instance.
default  09:05:12.117737+0100  powerd  Activity changes from 0x2 to 0x1. UseActiveState:1
default  09:05:12.118572+0100  powerd  hidActive:1 displayOff:0 assertionActivityValid:0 now:0xcb6 hid_ts:0xcb6 assertion_ts:0x0
default  09:05:12.145354+0100  backboardd  [HID] [MT] dispatchEvent Dispatching event with 1 children, _eventMask=0x23 _childEventMask=0x3 Cancel=0 Touching=0 inRange=0
default  09:05:12.152820+0100  SpringBoard  Icon tapped: <private>
default  09:05:12.158236+0100  dasd  Trigger: <private> is now [1]
default  09:05:12.159538+0100  dasd  Don't have <private> for type 1

default  09:05:12.170128+0100  trustd  cert[0]: SubjectCommonName =(leaf)[]> 0
default  09:05:12.170407+0100  trustd  cert[0]: LeafMarkerOid =(leaf)[]> 0
default  09:05:12.182388+0100  trustd  OCSPSingleResponse: nextUpdate 0.54 days ago
default  09:05:12.186084+0100  trustd  OCSPSingleResponse: nextUpdate 0.62 days ago
default  09:05:12.187067+0100  SpringBoard  Trust evaluate failure: [leaf IssuerCommonName LeafMarkerOid SubjectCommonName]

default  09:05:12.238604+0100  trustd  Task <TASK_UUID_REDACTED_1>.<1> resuming, QOS(0x19)
default  09:05:12.240650+0100  trustd  TIC TCP Conn Start [12:0xADDR_REDACTED]
default  09:05:12.241136+0100  trustd  [C12 Hostname#HASH_REDACTED:80 tcp, pid: PID_REDACTED, url hash: HASH_REDACTED] start
default  09:05:12.245884+0100  trustd  TIC TCP Conn Start [13:0xADDR_REDACTED]
default  09:05:12.246361+0100  trustd  [C13 Hostname#HASH_REDACTED:80 tcp, pid: PID_REDACTED, url hash: HASH_REDACTED] start

default  09:05:12.256520+0100  trustd  nw_connection_report_state_with_handler_locked [C12] reporting state failed error Network is down
error    09:05:12.256978+0100  trustd  TIC TCP Conn Failed [12:0xADDR_REDACTED]: 1:50 Err(50)
error    09:05:12.262697+0100  trustd  Task <TASK_UUID_REDACTED_1>.<1> HTTP load failed (error code: -1009 [1:50])

error    09:05:12.271646+0100  trustd  Task <TASK_UUID_REDACTED_1>.<1> load failed with error Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline."

default  09:05:12.271898+0100  trustd  Failed to download ocsp response http://ocsp.apple.com/ocsp03-wwdrg311/... with error Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline."

default  09:05:12.280643+0100  SpringBoard  Activating <private> from icon
default  09:05:12.281399+0100  CommCenter  #I CTServerConnection from pid PID_REDACTED has closed (conn=0xADDR_REDACTED)

default  09:05:12.513629+0100  SpringBoard  Bootstrapping com.example.myapp with intent foreground-interactive
default  09:05:12.514084+0100  assertiond  Submitting new job for "com.example.myapp" on behalf of <BKProcess: 0xADDR_REDACTED; SpringBoard; com.apple.springboard; pid: PID_REDACTED; ...>
default  09:05:12.514909+0100  assertiond  Submitted job with label: UIKitApplication:com.example.myapp[REDACTED][REDACTED]

error    09:05:12.516769+0100  SpringBoard  [com.example.myapp] Bootstrap failed with error: <NSError: 0xADDR_REDACTED; domain: BKSProcessErrorDomain; code: 1 (bootstrap-failed); reason: "Failed to start job">
error    09:05:12.516935+0100  SpringBoard  Bootstrapping failed for <FBApplicationProcess: 0xADDR_REDACTED; com.example.myapp; pid: -1> with error: Error Domain=BKSProcessErrorDomain Code=1 "Unable to bootstrap process with bundleID com.example.myapp"

default  09:05:12.517589+0100  SpringBoard  <FBApplicationProcess: 0xADDR_REDACTED; com.example.myapp; pid: -1> exited.
default  09:05:12.542638+0100  SpringBoard  Application process state changed for com.example.myapp: <SBApplicationProcessState: 0xADDR_REDACTED; pid: -1; taskState: Not Running; visibility: Unknown>

default  09:05:13.072994+0100  SpringBoard  Front display did change: <SBApplication: 0xADDR_REDACTED; com.example.myapp>

Is there any know problem with running Ad Hoc ipas on iOS 12?

Thanks Christian