Execute if & run sometimes breaks command blocks.

For some reason, when using the /execute if ----- run command within a command block the command block may suddenly break if it is unable to complete its operation. The command block will be rendered useless and won't respond to further code. The same exact code will work if I break and replace the command block. Below is the line of code I was trying to run with the command block when it broke.

execute if block ~5 ~3 ~-17 minecraft:magenta_wool run setblock ~5 ~3 ~-16 minecraft:lime_wool

This has happened to me several times today and it's quite annoying.

I've attached a screenshot of the bugged block. As you can see the 'Previous Output' field is blank and the block is refusing to report out any logs.