It hasn't been enabled.I know how frustrating this could be, especially on many Lineage OS based roms that I tried. Luckily, I don't frequently experience this effect on this rom.
However, from what you described, it seems like you enabled double tap on lock screen to shut off the screen? If so, try to disable this option from "Settings> crDroid Settings> Lock Screen> Double tap to sleep anywhere".
Otherwise, try adjusting the "Touch & hold delay" under "Settings> Accessibility".
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