See attached file - when showing display level 1 ("A" as box), layers 1 and 2 are shown as dots at some zoom levels.  [issue-875.zip](https://github.com/KLayout/klayout/files/6850638/issue-875.zip)
See attached file - when showing display level 1 ("A" as box), layers 1 and 2 are shown as dots at some zoom levels.
issue-875.zip