QuoteHi! You can try to reinstall your server. But before doing it make sure you have a world buckup.
Sadly that didn't work. 
Posts by icefighter5080
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Hey,
I have a creative server in 1.8.9 and it started lagging very badly a few weeks ago. Blocks dissapear, redstone doesent work, etc. We actually have quite a lot of redstone but no clocks. Also no plugins, just vanilla.
Please help fast, thanks in advance!