Hi,

I am facing a memory leakage using Shiny.

I tested the code at Memory leak when using ggplot2, grobs, and tabs. Shiny or my bug?. I observed that the memory is increasing each time a new tab is added. Why is it different from the proposed solution?

Best.

Here is the output I get. I created 21 tabs, then played with the last one. At each tab created, the memory increased. When changing the parameters and refreshing the plot, the memory is stable, which sounds OK.

```
Listening on http://127.0.0.1:5029
output: 9,829,752 B, mem used: 260 MB
output: 9,564,080 B, mem used: 260 MB
output: 13,836,296 B, mem used: 264 MB
output: 18,113,328 B, mem used: 269 MB
output: 22,389,544 B, mem used: 274 MB
output: 26,662,808 B, mem used: 278 MB
output: 30,932,080 B, mem used: 283 MB
output: 35,218,776 B, mem used: 288 MB
output: 39,507,840 B, mem used: 292 MB
output: 43,776,504 B, mem used: 297 MB
output: 48,060,248 B, mem used: 302 MB
output: 52,340,328 B, mem used: 306 MB
output: 56,617,560 B, mem used: 311 MB
output: 60,889,400 B, mem used: 316 MB
output: 65,172,600 B, mem used: 320 MB
output: 69,444,576 B, mem used: 325 MB
output: 73,719,408 B, mem used: 330 MB
output: 77,995,144 B, mem used: 334 MB
output: 82,266,176 B, mem used: 339 MB
output: 86,541,544 B, mem used: 344 MB
output: 90,819,704 B, mem used: 348 MB
output: 91,017,320 B, mem used: 348 MB
output: 90,882,712 B, mem used: 348 MB
output: 91,051,568 B, mem used: 348 MB
output: 90,884,376 B, mem used: 348 MB
output: 91,051,008 B, mem used: 348 MB
output: 90,883,768 B, mem used: 348 MB
output: 91,053,992 B, mem used: 349 MB
output: 90,714,912 B, mem used: 348 MB
```

```
R version 4.0.3 (2020-10-10)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19044)
Matrix products: default
attached base packages:
[1] grid stats graphics grDevices utils datasets methods base
other attached packages:
[1] gridExtra_2.3 pryr_0.1.5 ggplot2_3.3.6 shinyjs_2.1.0
[5] shinyFiles_0.9.2 shinydashboard_0.7.2 shiny_1.7.1
```