@mstkolf Thank you for filing the issue! I am able to reproduce it using RStudio Desktop 1.3.958 with R 4.0.0 and RStudio Server with R 3.6.3. We'll review this issue as we continue development of RStudio.
@mstkolf, thanks again for finding and reporting this issue.
We have a fix in place in our latest Daily build of the upcoming 1.4 release of RStudio (available HERE). If you get the chance will you let us know if the issue is resolved for you in that build?
System details
Steps to reproduce the problem
When you print the data in the console, these values will be NA correctly (even in int64 column).
Created on 2020-05-13 by the reprex package (v0.3.0)
But, if you click on a dataset to see the preview(or

View(tbl)), it shows first row value in col_int64 as 0, see the attached screenshot.The text was updated successfully, but these errors were encountered: