Command Block sometimes doesn't save command after clicking "Done" when there is server lag

• 20w21a Server, with ~200 command blocks (All in spawn chunks), Server was lagging at the time.
• When clicking the "Done" option with any command tested entered, command did not save even if there was a command set before. Events leading up to that point:
• used /kill @s ~500 blocks away from spawn chunks. Respawned (with some lag from respawning from several chunks away) and opened the command block. The command previously in the command block was "/execute at @a[scores=\{poison=1}] at @e[type=!Minecraft:player,scores=\{poison=0},distance=5] run effect give @e [type=!Minecraft:player,scores=\{poison=0},distance=5] Minecraft:poison 5 0 true" was no longer in the command block. Upon entering, and clicking "done" again, and entering the command block, the command was gone again. Also tried /tp @p ~ ~5 ~ and /clear @p, both not staying set in the command block.