Do you have the same issue if you follow the OP’s steps to reproduce it?
Yes
Provide extra information to complete the original description of the issue:
The confusion within this thread is related to whether or not the user has the WT GNS 530 Add-on installed or not. If it is not installed, then the AP and ALT hold functions as expected. If it is installed, it will break the KAP 150’s functionality significantly.
If relevant, provide additional screenshots/video:
Here is a video of the KAP 150 being operated on the ground when the WT GNS 530 Add-on is not installed. Note how the KAP 150 head unit will light up with the various mode annunciators as the buttons are pressed. Note the BC button operates and makes an audible clicking sound. Note, too the KAS 297 doesn’t display 99,900, either.
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Here’s another video when the WT GNS 530 Add-on is installed. Note, the KAP 150 head unit no longer illuminates its annunciators when the various mode buttons are pressed. Note the BC button is not “pressing in” or making an audible clicking sound when clicked. Note, too, the KAS 297 unit will display 99,900.
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This is a Microsoft aircraft being broken by a Microsoft avionics improvement to the sim. This needs to be fixed, please.