Haven't seen this one yet...
I think that when damage is incurred (which would be shown on the F10 readout) that the F10 readout should display automatically for a few seconds so you don't have to press F10 manually and lose focus. Of course F10 should still work, and if you run with the F9 readout on all the time of course it should switch back... It should just display the F10 info and then switch back to whatever was showing previously after a few seconds.
I think that when damage is incurred (which would be shown on the F10 readout) that the F10 readout should display automatically for a few seconds so you don't have to press F10 manually and lose focus. Of course F10 should still work, and if you run with the F9 readout on all the time of course it should switch back... It should just display the F10 info and then switch back to whatever was showing previously after a few seconds.