Often we have discussions about problems and we get excited about calling them a bug.
But what other names do we use?
For example, sometimes I will say:
This strange thing happened…
or one that I just used today
I noticed that this happened…
what other words do you use to describe bugs without saying the bug word?
I have seen something unusual
It looks abnormal
Not working as explained or suggested
System is behaving crazy
It seems to be odd
I usually say:
Sometimes depend upon the nature of the item as well, whatever suits in that moment 
My go-to is ‘unexpected behaviour’, short, simple and an easy conversation to have.
That’s classic and simple! 
Instead of “its a bug” I some times “it bugs me that” or “as user it would bug me that”.
Bug ist not just a noun. 
I just call them testing observations, though it depends how blatant the fault is.
I have also tried I struggling to do x as when I do I am getting y instead. Am I doing something wrong? Making sure that I accept that I might be to blame for the activity and to try and start a conversation with the developer.
there was once already a similar thread to this topic
where I created a Bob Ross meme about this
And in an earlier project I did once comment a bug work item as Happy Accident.
I use “unexpected behaviour” as well, particularly because it makes it subjective: I didn’t expect this behaviour, but maybe my model of the system is wrong, and someone else would have expected to see it.
One of the devs I’ve worked with used the word “opportunities,” as in, “There are many opportunities for improvement in this code.”
I generally say :
I tried something and… now it’s acting strange.
I think I found something a little off.
Not sure if this is expected, but it looks off to me