Steps:
1) Find a long twitter post
2) Click the 3-dot button in the post
3) Click "Translate with g"
4) Once the translation appear, scroll down
5) After a few scroll, the popup will close itself. Making it impossible to read the translation
The translation popup should never auto close itself. What's the purpose of doing that? It should just stay there until I decide to close it myself.
I did not use "Immersive Mode" and do not know if this issue also happen using it.