Switching editor in Studio Modeler loses incorrect parameters or correct formatting in RunOperation

Create an automation chain
Add an operation Execution Flow > RunOperation
Add parameters

doc1
mydoc1
doc2
mydoc2
doc3
mydoc31
mydoc32
mydoc33

Switch Editors

==> Parameters, if incorrect, are lost for good, even if discarding changes...

Also, you can notice the correct multi-lines input in Document > Document.Create

myparam=myvalue1\
myvalue2\
myvalue3

where the formating is destroyed when switching between editors