I'm using Essence Interrupter on one of my characters, and even though the weapon says it has pierce and shock damage, and deals best of pierece/shock, in the attack log it's saying a monster (a storm blight) which is not immune to pierce damage but is immune to shock damage is immune to the attack:  "<NAME> Hits Storm Blight, but Storm Blight is immune! <Pierce Damage Icon>" 

Is this a bug!?

Yes, it's a known issue with elemental weapons. They have an elemental keyword attached to them and if the enemy is immune to that keyword you will do no damage even if the weapon can do other damage type. An even more ridiculous example is with Dragon Dowry which is tagged as "fire" and, even though it does only pierce damage, it is completely ineffective against fire immunes (which are vulnerable to pierce).

PS. When using weapons with two types of damage you should pay attention also to enemies able to heal from elemental damage - if their armor against the damage absorbed is the lowest, your weapon won't switch to physical damage either.

Another reason to installing Community patch, game is literally unplayable without it.

Thanks @Kaylon this is good to know. This is quite a serious issue as one of my heroes as a devoted (hunting bow) ranger, which I built around the plan to use Essence Interrupter this run. I may have to bench them if it's going to be a regular problem.

@Okkes, I presume the CP fixes this particular issue then?

Funny thing is, I've completed Deadfire once, and done a few partial runs, but never tried the CP. Does the Community Patch work with achievements? I've got 50/55 achievements and want to collect the ones I've missed (3 of the faction endings that I haven't yet done and 2 DLC hidden achieves). And assuming the CP does work with achievements, can I change a run mid-way through to community patch (I'm a little over half way into a POTD upscale run and would be a pain to start again)? 

20 minutes ago, Vasvary5050 said:

Thanks @Kaylon this is good to know. This is quite a serious issue as one of my heroes as a devoted (hunting bow) ranger, which I built around the plan to use Essence Interrupter this run. I may have to bench them if it's going to be a regular problem.

@Okkes, I presume the CP fixes this particular issue then?

Funny thing is, I've completed Deadfire once, and done a few partial runs, but never tried the CP. Does the Community Patch work with achievements? I've got 50/55 achievements and want to collect the ones I've missed (3 of the faction endings that I haven't yet done and 2 DLC hidden achieves). And assuming the CP does work with achievements, can I change a run mid-way through to community patch (I'm a little over half way into a POTD upscale run and would be a pain to start again)? 

Mods don't disable achievements. Also you can use lots of console commands just not the ones tagged as <cheat>

Only thing I'm aware of that requires mods be turned off is the ultimate.

And yes you can change mid-way. Just put the files in your override folder, check under options -> mods that it's enabled, and that's it. Most of the changes are  minor and pretty transparent and you won't notice the difference unless looking for specific things. 

Edited May 23, 20232 yr by Shai Hulud

4 hours ago, Vasvary5050 said:

Thanks @Kaylon this is good to know. This is quite a serious issue as one of my heroes as a devoted (hunting bow) ranger, which I built around the plan to use Essence Interrupter this run. I may have to bench them if it's going to be a regular problem.

@Okkes, I presume the CP fixes this particular issue then?

Funny thing is, I've completed Deadfire once, and done a few partial runs, but never tried the CP. Does the Community Patch work with achievements? I've got 50/55 achievements and want to collect the ones I've missed (3 of the faction endings that I haven't yet done and 2 DLC hidden achieves). And assuming the CP does work with achievements, can I change a run mid-way through to community patch (I'm a little over half way into a POTD upscale run and would be a pain to start again)? 

In your case the fix isn't difficult - you just have to switch to Aamiina's Legacy (or a plain hunting bow) when you encounter shock immunes (unless you play also an Arcane Archer). 

Yes community patch solves the mess with many keywords.

Thanks @Kaylon and @Okkes. I'll try the CP (and carry a backup hunting bow just in case).