As you can see, the Handosntable is rendered in a Flexbox container: I know that is causing the issue, but it is a requirement for me, sadly. After hours spent on finding a solution, I decided to come to the forum and ask for help.
There are a couple of issues related to the use of flexbox. I will investigate the subject further, but it does not seem to be a quick CSS hack kind of solution.
We’ve just reviewed the code with my colleague and you are completely right. The dropdown/autocomplete cell type does not work well when put in a flexbox.