So, when a dupe who normally snore while sleeping, normally it releases snoring-waves to indicate that he's snoring (I do not mean the block-range snoring)
Sometimes, when he wakes up, waves don't disappear and keep pulsing, but they just do anything, so I think it's a Graphic bug.
Steps to Reproduce
A snoring duplicant waking up.
This issue has been fixed in either a future version or updated in a previous version.