At level 11 I found Iron ore and mined it. When it became its item form, it flashed blue. After attempting to recreate this problem, I found it occurs most frequently at light level 4. I have attached a video showcasing the problem in my Hardcore survival world (It's a video because the problem was too fast for a picture to be taken),
Thank you for your report!
We're actually already tracking this issue in MC-170340, so I've resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
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