Run output is automatically hidden including error message!

I've just upgraded pycharm version from 2017 to 2018.1.2. But a serious problem is occurring frequently.

I often run a code in 'run file in console' mode for debugging. After upgrading, whenever I run a code, the messages below 'PyDev console: starting.' are automatically folded. So I can't see the possible important messages shown after the pydev message even including error messages! I have to always unfold the message by clicking it to see whether an error occurs or not.

I wonder if there is an option for preventing the automatic folding. If not, this issue must be solved by making a user option to deactivate it.

I will include some screenshots.

<1. initial output with a folded message at the bottom>

<2. cursor on the message reveals the hidden messages>

<3. after clicking the message>

Thank you!