Some keys occasionaly stop working in the hint edit field

At times keys including Delete, Arrow keys, and Shift+1,2,3,4 stop functioning in the hint edit field. It used to happen in the widget before the update as well.
Once this problem appears, only reloading the lesson page helps.

I hav created over 3000 LingQs in the last two weeks and have never come across this issue. Anyone else out there who has?

I’ve been coming across it for a year on all imaginable PCs, operating systems and browsers.