Spiders spawning on 1x1 blocks

Can you please re-phrase this ticket ? (e.g. "Spiders spawning on flat surface smaller than 2 x 2") It's not quite clear what you mean.

And please attach a screenshot with debug screen shown (F3) and place a torch - it's too dark to see anything.

Ticket resolved as incomplete, because no answer in a reasonable amount of time (1+ year), if it still happens, please update the ticket.

Mojang treat this bug reporting like it's rocket science.  We are literally average players, yet they want us to bring them in depth scientific analysis in bug reports.  It's so annoying.  Loads of bugs go unfixed or ignored because of this!  I have bug reports that are YEARS old!