I  havent  tested  this,  so  you're  saying  he  wont  apply  a  new  shield  unless  it's  value  is  bigger  than  the  one  on  currently,  even  it's  the  current  one  is  about  to  expire??

If  this  the  case  then  MM  just  became  usless  in  spider  and  i'm  guessing  he  eas  a  carry  in  that  dg  for  a  lot  of  players.

Yeah.. This is their "fix" to Scrapper as players complains it overrides his bigger shield and now Miscreated Monster (and probably there are others too) is now broken lol

I remove some of his artifacts, put him in vault and now I am using Metalshaper again in Scarab boss

Just  watched  a  vid  by  a  content  creator  and  apparently  they  are  aware  of  it  and  it's  going  to  be  fixed,  hopefully  soon.

WE WILL BE LUCKY IF IT IS FIXED IN 3-4 MONTHS. AWHILE BACK DEATHLESS A3 WAS BROKEN, IT WAS REPORTED ON THE FORUMS AND PLARIUM SAID IT WAS BROKEN.

THE ISSUE WAS WHEN YOU USED THE A3 THE GAME WOULD FREEZE FOR A SECOND OR TWO AND THEN NOTHING WOULD HAPPEN. nO DAMAGE NOTHING.

IT TOOK 3-4 MONTHS TO FIX. DONT EXSPECT THIS TO FIXED ANYTIME SOON. tHEY DONT CARE OR THIS WOULD HAVE BEEN CAUGHT DURING TESTING.

And all the while they leave him broken, they collect $$ from everyone buying resources to level his replacement for DT progression. Good ol' Palarium and their unethical business practices at it again.

What are you talking about? He got fixed in the last update, there's nothing broken anymore. 

Well they must of missed mine cause he still bugs out and doesn't cast it properly. Tried scarab multiple times today and he kept putting up a 2 turn shield on CH about 3/4 of the way thru the fight. All other champs got 3 to 4 turn shields. So if he's fixed and my CH is slower 1:1 speed w/ him, how does she manage to run out of shield in 2 turns?

When he puts that shield, does CH already have an existing shield and how many turns are on that? The release notes of the last update mentioned: 

1. If a Champion has an active [Shield] with the duration of 1 Turn and receives another [Shield] buff with a higher duration, the new buff will take precedence and apply no matter the Shield Value
2. If the choice will be between two [Shield] buffs and their duration equals 1 Turn, then the buff with the higher Shield Value will be applied 
3. Except in the case when a Champion has an active [Shield] buff lasting 1 Turn and by some effect applies a new [Shield] with the same duration during their Turn - then the new buff will apply so that the Champion does not end up losing their [Shield] after their Turn is over 

So if your CH has no shield or a 1 turn shield at the time, he should put a 3/4 turn shield no problem. I'm not sure what would happen if she still has a 2 turn shield at the time - possibly he would not extend it to 3 turns in that case indeed. 

She was down to 0/1 each time. I have to run it in manual so I pay pretty close attention to who has what. 

Then that does sound like a bug, I'd suggest taking a video and sharing with support. 

Lasting gifts mastery can cause problems with monster shield in scarab.