Ways to reproduce
- Create an activity diagram with a fork
- Change the theme to any one of the built-ins, e.g. amiga
- The fork line does not show up
This affects about 2/3 of the built-in themes in the Online Server
Test text:
@startuml
start
:Hello;
fork
:World;
fork again
:Venus;
end fork
stop
@enduml
Change to another theme such as "blueprint" or even "plain"
On a Mac running OS X Big Sur, have tried in Safari & Firefox.