I solved problem. After modpack update I tried mods like advanced info about dispersion, time to aim all in one, and other stuff. After some time I noticed the problem with missing attendance markers so I Reinstall whole modpack without this new mods I was trying. This didnt help neitheir. After some time, found you can turn off/on them (attendace markers) with game settings.
They were turned off. I didnt touch settings since last year. Can it be, some mod turn it off by itself?