Mermaid fill color not works as expected

Summary

Write an mermaid schema what uses fill style makes text color same as fill color and the result is that you cannot see the text.

In the Mermaid live editor the text color is ok.

Steps to reproduce

Write this code in one markdown file and see the preview.

graph LR

SavePropertyController --> SavePropertyCommand
SavePropertyCommand --> SavePropertyCommandHandler
SavePropertyCommandHandler --> EventElastica[elastica.postupdate]
SavePropertyCommandHandler --> EventProperty[property.postdisable]

SavePropertyController --> Exceptions
Exceptions --> ExceptionList(SecurityException<br/>EmptyRequestBodyException<br/>Throwable)

classDef Ui fill:#FFFFFF
classDef object fill:#1E98EC
classDef event fill:#ECB11E

class EventElastica,EventProperty event
class SavePropertyCommand,SavePropertyCommandHandler object
class SavePropertyController Ui

What is the current bug behavior?

The text color has the same fill node color.

What is the expected correct behavior?

Respect black text color as mermaid expects.

Relevant logs and/or screenshots

Actual

Expected