I don't know about what labels you had that disappeared from tables you had....
but I see a couple of syntax errors.
You don't have a comma that you need to have between tags$td(Label("Period:")) on one line and tags$td(textInput("txtper1",width="50px",NULL)) on the other.
Theres a free floating tr at the end of what you shared that will break the code.
I don't recognise what package the Label() function you use is supposed to be from ... ?
if its not defined anywhere it will error; perhaps you meant tags$label("Period:").
Perhaps you can explain more what your issue is.
The cleaner up code, does produce content; the text you provided is visible; is it somehow incorrect, are you comparing it to something in particular ?
It was crazy....hv no idea about the cause. I decided to refactor the code. Its still small, instead of searching for this "bug". Thanks again, apreciated your help...greetings...