This just happened to me too - in my case I built a storage drone platform nearby to a mining drone platform, both T2.
i decided i wanted to move the storage platform and i forgot i could just use the move commands, so instead i deconstructed it. I suppose i was standing close enough to the mining drone platform that as soon as i deconstructed the storage drone platform it got highlighted. I ran forward to pick up the dropped items from deconstructing the storage drone platform, but my highlight has stayed on the mining drone platform, no matter how far away i run it stays highlighted, and the prompts say e to deactivate drone platform q to switch build menu actions.
neither button does anything, and moving to another machine does not change the highlight. I also do not seem to charge when beside the proximity charger when this is happening, but im also not losing any power. (display says 68, 7 bars visible on pack)
also cannot jump or activate flashlight or anything.