No spacing between the tab names in shiny applications

I have created a shiny application and there is no extra spacing between the tabs which I have rendered to the UI. I am using bs4dash shiny framework for the UI. Is this issue related to the this framework?

code :

tabsetPanel(type = "tabs",
                          tabPanel(title = "abc", 

                                   rHandsontableOutput("contentsl"),tags$style(type="text/css", "#contentsl th {font-weight:bold;}")),
                          tabPanel(title = "fgh",
                                   rHandsontableOutput("content1"),tags$style(type="text/css", "#content1 th {font-weight:bold;}")),
                          tabPanel(title = "hjk",
                                   rHandsontableOutput("content2"),tags$style(type="text/css", "#content2 th {font-weight:bold;}")),
                          tabPanel(title="pqr",rHandsontableOutput("prem"),tags$style(type="text/css", "#prem th {font-weight:bold;}")),
                          tabPanel(title="Scatter Plot View",plotlyOutput("pl9",width = "100%",height = "600px")),
                          tabPanel(title = "Box Plot View",plotlyOutput("pl8",width = "100%",height = "600px")),
                          tabPanel(title = "Plot Data",rHandsontableOutput("pl.data",width = "100%",height = "100%"),tags$style(type="text/css","#pl.data th {font-weight:bold;}"))
                          ))