elseif and swimlane

Question

Hello,

I try to distribute "if" sentence and multiple "elseif" over swimlane partitions and I meet the same problem described in this question :

https://forum.plantuml.net/11184/ifelse-and-swimlanes-seems-to-break-logic?show=11184#q11184

1. First problem : line breaks over partitions,
2. Second problem : I would like each condition to appear in the swimlane where activity meet condition.

Example to reproduce the problem :

@startuml

|actor1|

start

:activity1;

|#AntiqueWhite|actor2|

:activity2;

if (condition1) then

|actor1|

:activity3;

elseif (condition2) then

|actor2|

:activity4;

elseif (condition3) then

|actor3|

:activity5;

endif

|actor4|

:activity6;

stop

@enduml

Thank you for your help !