I can't see red warnings in colapsed blocks

Hello!
I use colapsed blocks for easy reading and when some red warnings apear and I want to see them something strange happens: if I click on the show warnings arrow the block that contains the warning expands only for a few milisecs and it is impossible to see it. So it takes a lot of time to expand block by block to find the warning. Is there any solution to this situation?

I found myself the solution: double-click the error arrow.