The left panel shows the next step incorrectly during creating a new one

When I define a new step, the left panel shows the next step wrongly. The type of the next step is the same as the type of step which is currently being defined.
E.g. I have three steps (timer -> DB -> DB):

When I want to create middle step (log),

the left panel shows incorrect next step (should be PostgresDB, not Log). The left panel shows that next step is the same as actual defining step (which is not true)

After save, the steps are shown correctly.

When I edit that log step,

this problem is not happening again. So it looks that this happening only during creating a new step.