Redstone repeater glitches out when you go and spend time far away
As you can see on the video i have a redstone contraption and a redstone clock and after i fly away with elytra for like a minute and come back you can see that 2 redstone repeaters light up instead of the original one this is just a small scale showcase when i stay away for more time more redstone repeaters light up breaking my contraption
How to recreate
Make a redstone repeater clock
Set it up so only one repeater lights up at a time
Go somewhere far away
Wait a few minutes
Come back
And you should see that more redstone repeaters light up instead of the original one (the number of redstone repeaters lighting up depends on how much time you spend far away)
Note: i flew away with elytra in the video just becouse its easier in survival it dosent matter if you fly away or run away it happens as long as you are far away
And you may still be confused about the bug even after you look at the video thats becouse i didnt stay away for long enough for the second repeater to fully light up but if you pay attention you notice that the second repeater lights up slightly before the first one loses its signal while in the first part the second one lights up as soon as the first one loses its signal the redstone delay slightly builds up for as long as you stay away