I can confirm JayRocs findings. The bug seemed to be disappeared after some patches but now, if go on to buddyspike's syria 80's server, hit F10 and simply scroll in or out, all icons disappear like in the first releases of 2.7. It doesn't matter which kind of slot i choose. So it's not only occurring while in JTAC slots. And yes i also have an AMD system. Radeon 5700XT and a ryzen 3700 CPU.
But for now, it ONLY happens on that specific map/server combination