df <- tibble(x = 1:5, y = 1:5, z = letters[1:5])
This df shows as Size 0B for me (RStudio2022.12.0 Build 353) in the Environment panel, but results in 1512 bytes when entering object.size(df) in the console. I found an older issue where a somewhat similar problem was described, but it seems closed here and is not clear to me if there was a solution/explanation. This is not causing me problems at the moment, but I'm curious to understand why only some objects present this issue.