HTTP interface issue?

I am missing something simple.
When I try to build a pedalboard the Jacks on the right side are missing 90% of the time.
I’ve tried resizing and zooming and panning but i cannot get them to appear, either to plug in or to unplug a connection already made.

Sometimes the jacks are where they are supposed to be and i have no issue …
Using Google Chrome for the browser.

Any guidance would be appreciated.

Could you post screenshots of how it looks like when it’s working and when it’s not?