Blue outlines on enemies

After the Nov,17 patch I am randomly seeing blue outlines on enemies when playing Zen. It’s confusing to say the least and in many situations it just leads to losses.
Haven’t noticed this on other heroes but as Zen it seems to happen very often now (maybe because I mostly play him). Discord orb can also display as blue at random moments.
When I watch replay or highlight, everything is normal as well and starting a new game resets it but then it starts happening again. I can’t see the clear pattern

I tried changing friend\enemy colors but it doesn’t seem to have any effect
Never noticed this before the patch, now it happens every game at some point.

I have an evidence video but can’t attach it because the forum says I can’t post links