Is the bonus deflection from items (for example +5 Reflex glove ) stacking with bonus deflection from abilities (for example +10 reflex from chant "Blessed was  wengridth")? I am asking because I would have expected that deflection from different sources should stack... However, In-game tests showed that they don't, so I'm not sure if it's a bug or a normal behavior.

They don't stack. It only counts your highest deflection (or whatever else) bonus

Identical bonus types do not stack.  If you go into your character screen and look at the bonuses your items are giving you, you will see the ones that are "suppressed" and can adjust your party's equipment to minimize overlaps.  It's not something the game really explains very well.

@Atheosis, you misunderstood the question.

 

@Hebruixe, I'm not sure if you referred to the same situation like Atheosis which is not what I asked. In case you didn't, this is weird behavior isn't it? I mean I understand that they shouldn't stack if from the same source (like several items providing the same type of deflection, only the best should be taken into account), but from different sources (items, spells, chants etc) it does not make much sense.

Yeah, I would definitely expect those two examples to stack; post this in technical support as a possible bug, perhaps.

Ah. I too misunderstood the question. Upon closer examination I admit I don't know the answer but agree it seems like a bug.

I noticed this as well but forgot to report it. Pretty sure it's a bug. Equipment will suppress other equipment, and abilities/buffs will suppress other abilities/buffs. Buffs shouldn't suppress equipment, though. I'd report it in tech support if I were you.

Bug reported, thanks everyone for clarifying this.

I even noticed resting bonuses suppressing item bonuses.. I should've taken a screenshot of that.

 

Though I did cycle through my characters. I had a rather large resting bonus (Dragon's Lair, +2 con +2 might + 2.. something), and it seemed to suppress items that gave lower than that. But items that gave more (say, +3 might) weren't suppressed, nor was the resting bonus

You've got resting bonuses suppressing item bonuses on your character sheet?  Because it is definitely not doing that for me.

Yeah, only saw it once though and I'm unsure if it was before or after the patch.