Weird glitch - help

Been testing a custom recently and getting random desyncs with my testers, couldn’t figure out why until recently I noticed that with certain spells it will show damage done on my screen roughly x10 what my tester sees… the context is this, I have test dummies set up to test spells, when he uses the spell it shows 100 damage, but for me I see 1000 damage… even the test dummies HP shows as being lower on my screen. I see the dummy at 60%, he sees it at like 95%… but when the unit dies, I’m assuming due to this glitch, everyone desyncs. HELP

is your map in lua mode?