Thinking processer speed,& ram. If your frames per second drop, your machine/game engine, reverts to core elements in program. Example:@2048 TC. your/my radar will not report any enemy contacts. seems that over working my rig, above 1024 screws the game program.

Solution :

Only use high tc to get to enemy waters. Running hi tc in search grid, watch the stopwatch,when it glitches, drop out of tc quickly, check radar for blips.Workaround time.