Thanks, good to know it’s not the usual mess with proprietary software & cameras. Nothing to worry about then 
Good thing it’s not 48M low quality pixels ending in the file for the sake of making bigger numbers. Which would bloat the storage for the same perceptible quality.
What is seen clearly is 48Mpx! 
Not even MPs. At least on the EN,NL,DE,ES versions what we see the most clearly is 48MP without the x. And then there is one of the less visible ever link to see the specs. (“Caractéristiques”, bellow the pictures, after scrolling)
But don’t worry, I didn’t buy the module. (it’s not even possible anymore) It’s from my FP3+ with a dead motherboard.
So it wasn’t a complain about being mislead when buy a module.
Until now I had only seen the specs on the LOS wiki and the usual specs sites. When looking for other info. And they all got it wrong…
- Info about FP3 variants | LineageOS Wiki
- Fairphone 3+ - Full phone specifications
- Fairphone 3+ specs - PhoneArena
- Fairphone 3+ - Specifications
So it didn’t come to mind it would be something unrelated to the usual custom ROMs cause by sensor manufacturers.
«specs clearly say» To be honest that 48MPs/12MPx thing is likely a more flatterous way by the sensor vendor or the phone vendor to advertise a product. That make better headlines to have the new model go from 12 to 48 instead of «it’s better but camera quality is complex, especially because we changed vendor so look at reviews.»
Which lead the 4 above places (and more, like tech news sites) having the wrong info.
From the link sent by yvmuell:
+1
After digging more, FP3+ press release: Wayback Machine
«rear camera from 12 megapixels to 48 megapixels»
«Camera Modules: 48MP/16MP»
Without more info as far as I can tell.
So here is the source of the confusion for most of the third parties. Thanks deceptive marketing 
.
General public page for the camera upgrades: Camera upgrades for your Fairphone 3 - Fairphone
From at least end August to December there is only 48 mentioned. Not findable 12 mention.
Module store page: Fairphone 3 Camera+ Module (48MP) | Fairphone Official website
Until at least October, not even actual specs. And only 48MP mentioned in description.
Now the word “camera” will be in this thread. Until now, it wasn’t. And the LOS 21 and 20 threads didn’t seem to have relevant occurrences. So people with LOS thinking the most likely cause of weird stuff related to camera is specific to custom ROMs will have these messages findable.