Of course I’m happy to provide further information about the situation.
When Apple Live is used the iPhone takes multiple photos over a short period of time. The phone sets one of these photos as the default one. (I’m describing this as unedited.) Alternatively one of the other photos can be selected to become the default photo - perhaps because it is more in focus. (I’m describing these as edited.)
Recently only the unedited photos will upload to iSpot, whereas the edited ones fail.
The files are in Apple HEIC.
I haven’t heard of this bu according to Wikipedia “ HEIC is the file format name Apple has chosen for the new HEIF (High Efficiency Image Format) Standard. Using advanced and modern compression methods, it allows photos to be created in smaller file sizes while retaining a higher image quality compared to JPEG/JPG”
I don’t think the problem is caused by something like a poor USB connection.To test this I’ve downloaded both edited and unedited photos from my phone to 2 different computers using different connection leads, but when I then tried to use the computers to upload the photos to iSpot, only the edited ones fail to load.
As suggested I tried to upload one of the difficult photos to the forum but I had a message saying that the photo was corrupted and they system could not determine the image size.
From this it seems likely that the fault is arising from either the Apple iPhone 8 software or iSpot, rather than the intervening computers.
Interestingly I have gone back through the photos and the problems have only arisen with ones taken from 30th October onwards - although I might have edited them a few days later. This was around the date when Apple updated iOS14. Clearly it is a possibility that changes in the Apple iOS operating system could have some sort of connection with the problem.