Have the trinket "Pocket Sized Computation Device" with all 3 sockets filled.
Red-Cyclotronic Blast which is an active ability and the Yel and Blue sockets are
passive abilities.
When I add any of the commands "/use 14" ,"/use [nochanneling] 14","/use [mod:shift] 14
anywhere in the macro body, when trying to exectute the macro will lockup and will not unlock until I execute another command not within the macro . The trinket works fine when I just add it to my action bar. Is there something I maybe missing? Any help is appreciated.

Unfortunately the trinket is very tempermental and has quirks that are unique to the combination of the specific three items you have in the trinket. The most reliable solution is to leave it outside your macro and fire it when you need it.

Using Nochanneling works but after the channel ends the macro is locked up till I remove the trinket. Just got the Azshara trinket and it does the channel but then is locked just like the Pocket trinket till I remove the trinket from being equipped.

Wont fix is a bad label as it should be unable to be fixed however with Shadowlands this is no longer an issue really.