Any item dropped can become invisible. This happens at about a 20% chance. I only found it to happen on servers, even with the plain vanilla server. Other people playing said they haven't/aren't experiencing this issue.
My client is not modified in any way (e.g. Optifine or Forge). I have tested and am experiencing this on version 1.13+, may be on 1.12 or lower too.
Video (is in attachments too): https://streamable.com/0niqb
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[media]

Duplicate of MC-111978