What steps will reproduce the problem?
1. Playing with a paladin on 110 in Legion
2. E. g. attack the last boss in Eye Of Azshara
3. The spell Arcane Bomb creates a debuff, which is not shown by the SUF. It's configured to show me only curable debuffs. This (magical) debuff is curable.

What is the expected output? What do you see instead?
I would expect to see the debuff in my party / raid frames on the hp bar.

What version of the product are you using?
4.1.10

Do you have an error log of what happened?
It's simply not shown - no error window is created.

Please provide any additional information below.
Well I got up with one thesis:
Since I can't recall, that Paladins were able to cure magic debuffs before (I guess it was changed in Legion), maybe it's simply not considered in the algorithm.
Also there are other magical debuffs (e. g. one in the Vault of Wardens from the first grouped mobs, a stun) which are not shown in the SUF but in the standard blizzard raid interface with the same filters.

According to WoW head there was a change in the paladin's cleanse spell:
http://www.wowhead.com/spell=4987/cleanse#changelog