Martial Dice Gone?

So in my campaign I'm playing a Level 14 Monk (Warrior of the Open Hand), and we're using 5.5e rules. I have heard of a common bug where monk's martial dice display incorrectly, however mine do not display at all, it simply shows "+6". Does anyone know how I can get my martial dice back?

Completely forgot to specify where, my Unarmed Strikes simply display "6" and then the fist icon for bludgeoning damage, rather than displaying my martial dice with them (EX: 1d10+6), and when I attempt to roll my Unarmed Strike's damage it simply comes out as 6 every time, its as if I was never even a monk. Our campaign does have alot of homebrew, not sure if any of that may have caused an issue, however nothing in the campaign had changed recently relative to when the issue started. I cant seem to figure out how the image posting system works but I'll share my character sheet: Yuji Itadori (Yes im playing Yuji). If there is any way to fix this, information would be much appreciated because its incredibly annoying to have to roll my damage dice manually each time. Thanks for your time, if theres anything else you need from me just let me know.

Quote from Anklebiter1 >>

Completely forgot to specify where, my Unarmed Strikes simply display "6" and then the fist icon for bludgeoning damage, rather than displaying my martial dice with them (EX: 1d10+6), and when I attempt to roll my Unarmed Strike's damage it simply comes out as 6 every time, its as if I was never even a monk. Our campaign does have alot of homebrew, not sure if any of that may have caused an issue, however nothing in the campaign had changed recently relative to when the issue started. I cant seem to figure out how the image posting system works but I'll share my character sheet: Yuji Itadori (Yes im playing Yuji). If there is any way to fix this, information would be much appreciated because its incredibly annoying to have to roll my damage dice manually each time. Thanks for your time, if theres anything else you need from me just let me know.

 You're wearing armor.

Just to expand on what jl8e said, the Monk's Martial Arts feature specifically says that it only works when you aren't wearing any armor. You have a homebrew magic item in the Armor category equipped, which causes the character sheet to turn off your Martial Arts features, including the special damage die for unarmed strikes.

That must have been added recently because it didnt cause any problems until now, thanks though!