Web client: Cannot copy/paste parts of text from one table cell to another

Web client: Cannot copy/paste parts of text from one table cell to another

Try to highlight "Red tomato" in cell A1, and copy/paste it beneath "Yellow banana" in cell B1.

While this works with the desktop client (Mac), it is not possible in thweb client (Firefox, Chrome on Mac). You can only copy and paste the whole content of cell A1, by overwriting the existing content in cell B2.