I have a Logitech G PRO Wireless and when I keep it at my usual 1000Hz the input becomes unresponsive. Sometimes shooting gets stuck or doesn't register. Bringing it down to 250hz seems to run fine.

Is this a known issue? 

Yeah I've had the same issue. It's probably the main thing preventing me from using this engine regularly. Haven't tried changing the polling rate yet. 

Might add:

if (scr_center_lines <= 4)
..... y = vid.height * 0.35;
.. else
..... y = 48;

Is the original Quake code. And quite terrible, really.

I came across one of Carmack's old .plans: https://github.com/ESWAT/john-carmack-plan-archive/blob/master/by_year/johnc_plan_1996.txt#L3436

changed center print position for very long text messages AND end of e4 text crash both on the very same day.

Hmmm - fishy.

The end of e4 text is 17 lines; 17 * 8 + 200 * 0.35 is 206 - yes, that'll overflow a 200-high display. 17 * 8 + 48 is 184, however.

Looking further at Sbar_FinaleOverlay we see Draw_TransPic ( (vid.width-pic->width)/2, 16, pic); - and this banner pic is 24 texels high.

So I'm 99.99999% satisfied that the weird centerprint y calculation is for positioning end of episode messages. 

Now we would just need someone to implement this code. :P