Factorio Forums

This is a bit of a funny visual bug in the selector combinator. If you set it to Quality transfer, then set a signal in the "select from signal" box, pick up that item and scroll it through the qualities by pressing alt and scrolling up and down, the quality selection in the "direct selection" option goes crazy. As a bonus if you then clear the item from the bottom option and set a new one it will start rapidly switching between those two. The same thing happens if you just hover your cursor over the signal in the box and then click alt and scroll.
Here's a video of the explained:

Thanks for the report. This is now fixed for the next release.

Appreciate the fix thank you so much!