Sorry your old workflow is interrupted.
I'm on the preview of v1.4 with R 4.0.2 and don't run into this issue. In excel, the text to column feature converts View output, tab-delineated, into a table just fine.
View is an R function and I don't think its' output has changed recently, RStudio shouldn't have anything to do with this issue.
As a shortcut, you can always save the table as csv?