Can't upload iCloud images form linekd album

Now this is quirky: I have many iCloud shared albums, a mix of my own that I have shared to others and some that others have shared to me. However, there is one specific shared album where trying to add a batch of photos into the Meural playlist fails with a message "some items failed to upload" - on investigation, none of them uploaded. Repeating for just a single photo also fails. Adding a single or multiple photos from any other shared iCloud album or my own non shared photos in iCloud works fine, so there is no image limit in my Meural playlist that I have reached and hitting. I tried restarting the Meural app, but get the same error. Looks like a bug with the iCloud shared album - so I'll ask the other family member to re-share it to me and see if that works, if not, then I will check the source image properties in that shared album in case there's a bug with Meural's support for different file formats.

Is there a fix by now from Netgear?

If by "fix" you mean "still pretends there is no bug, after several years," then yes, otherwise, no.

The app on the iPhone still fails to add a photo from an iCloud shared album and gives an error that says "File extension 'heic' is not allowed..." which is incorrect as all 592 uploads in my Meural library are HEIC format!

I can add a photo that I've just taken on my iPhone and it adds fine, and that's also HEIC format. I also see all the photo's meta data in the details. 

If I log in to the my.meural.netgear.com portal from my MacBook Pro using Safari, I can upload any number of photos (I tried 200) from that same iCloud shared album without error. However, the photo meta data is not upload and all the titles are replaced by a useless hex string unique to each photo, like this 1D62FC13-D242-4576-B86A-621F48C269D1. I will have to delete them all and re-upload when the bug has been fixed.

So two bugs: (1) the Meural app on iPhone cannot add from 'some' iCloud shared albums despite all image formats being heic. (2) the work around for adding photos using the Safari browser does not upload the photo meta data.

I will play around with the iPad app and Safari browser to see if the bugs are consistent across devices or unique to one device type.

The Meural app on the iPad fails to upload a single photo from a shared iCloud album. 

A Safari session to my Meural account uploads fine, but the uploaded photo title is the long hex string. 

Therefore the Meural app has a bug with iCloud shared albums and/or heic format (older shared albums with different image formats to heic or older versions of heic seem to upload in the app). There is also a bug with the browser session upload feature messing up the photo EXIF data, or ignoring it and replacing it with some unfriendly hex string ID. 

A few further potential tests I could try are saving a JPG photo in the shared iCloud album that has been failing and seeing if that uploads in the Meural app from the iPhone and iPad. And trying a different browser like Chrome or Brave on both devices. 

Interim update: iOS 15.6.1 has not made any difference, which isn't a surprise as that update was for security vulnerabilities. I installed Chrome on the iPad and it gives the same results as Safari in the Meural web portal - uploads are fine from an iCloud shared album but it still loses the photo data and changes the title to an unfriendly hex string. Meural app still fails to upload any photo from a shared iCloud album (containing recently taken photos) giving an error that relates to the image's header. 

Will see what iOS 16 brings in terms of heic image interoperability with Meural with the browser. Hopefully Netgear will rollout an updated app as well. 

I still cannot link a number of shared iCloud albums after the update to iOS 16.1 - I was hoping Photos would have had some bug fixes. Meural app still the version from a few months ago. I cannot determine why some other shared iCloud albums from the same sharer and their same phone work fine. Same photo format just more recently taken. Not Live Photos and no videos in the album, but the photos may have originally been Live Photos prior to them being edited. I have tried re subscribing to the shared album, deleting it in the Meural app etc. and a manual upload of a single photo from that share album gives a format error. 

Hopefully a Meural app update is on the way. 

I may try asking the sharer to create a new shared album and add one of the offed ing photos and one new photo to it and see if this links. 

I have been experimenting.

If the photos are JPEG then it works. If Apple HEIF and after a variant of iOS 15 (not sure which but mid last year), then the linked album is empty and cannot be synced. It goes through the download process and progress bar in Meural app but the linked album never refreshes and remains empty.

All my own photos in iCloud that are HEIF upload fine to Meural, manually to new playlists or via linked albums.

if I create a shared album in iCloud, add photos that are JPEG and HEIF, then create a linked album in Meural to this iCloud shared album, only the JPEG's sync up to Meural. Yet I can manually add those HEIF photos to a playlist. 

The Meural linked album process rejects HEIF images from iCloud shared albums but these same photos can be manually uploaded into Meural library playlists. 

Thanks for this info.  I think it holds true for all, but I'm just disappointed with Netgear/ the Meural.  I absolutely love it but I am constantly dealing with syncing issues.  I too learned about the HEIFs and issues with linked albums.  Support just tells me to add them via a playlist and I try to tell them that it completely defeats the point of a linked album that I can update through my phone.  Generally disappointed and sick of the amount of time invested in trying to figure out how to get my three meurals to act like I want them to.  

Couldn't agree more with this sentiment.  Bought high end items that I love but are not used to their full potential due to syncing issues.  I'm sick of investing time and dealing with unhelpful NG Support (polite but don't resolve the issue).  I also don't understand how or why this issue cannot be remedied by NG.