Hello Asherdoom,
It is a Combat Log Bug that is causing this issue for you. You would face the same issue if you ran with no add on's at all. I personally use a add on that just fixes this which you can download here:
https://www.mediafire.com/file/xd537...5s0/CL_Fix.zip
All it does, basically, is running this script:
/run local f = CreateFrame("frame",nil, UIParent); f:SetScript("OnUpdate", CombatLogClearEntries);
If you do not want to download the addon, you can make a macro with the script and run it when the bug appears.