Can No Longer Resize/Move/Rotate Imported Images After Update

Running Adobe Premiere Pro CC 2018 v12.0 Haberdasher on Windows 10.

Ever since I updated, when I import a still image into Premiere I'm not able to double click the image on the screen with my mouse and have that helpful little blue box show up where you can drag the corners to resize, rotate, etc. The best way to get it back is for me to restart Premiere, but since I'm working on a project that uses a lot of images this is very frustrating. I've seen other posts suggesting to have the "motion" effect selected- this does not work. Here's my process when Premiere stops showing the blue resize box: double click the image on the screen, double click it again, select "motion" in the effects, turn the "motion" effect off and on again, select "position", double click the image in the timeline, toggle and untoggle motion, scale, or rotation animation, click around on the screen some more, try to drag the image (it doesn't work, it then selects the video file underneath but does not move anything), angrily hit random buttons on my keyboard, click around some more, and SOMETIMES with no apparent rhyme or reason, either the blue box magically shows up again, or I am somehow able to manipulate the image (as if the blue box was there, but just invisible). So that's where I'm at.

Does anyone have any suggestions?