The aiming triangle is misshapen, floats about the window, and I'm not getting any points.

This bug seems to have been introduced with Season 7, and was first reported ~1 day after release.

Since then, there have been several more reports here, here, here, and here.

The posted workaround is to log out and log back in between doing the Romulus Radiation Scan and doing Dilithium Mining. However, some have reported that only completely exiting out of the STO application and restarting has worked for them.

There has, so far, been no announced plan to fix this bug.