Timer condition not work if it using variables by expression

I don't know much about restrict actions, as I've never used it, but your example does work. Click the right button, then the left, then wait 30-60 seconds, and you'll see.

For whatever reason, whenever you change the value, the counters won't use the new value until they've completed their current queue using the old value. So when you change it to 300000 then 3000, you don't immediately see the 3000 timing because the counters are still waiting to complete the 300000 timing, which takes a long time. Once each counter completes this slow 300000 timing, it will start moving quickly, using the new 3000 timing.

I don't know. I guess it's just programmed differently. But I don't know if it's a bug or a feature.

Another odd thing I noticed is that the middle counter always seems to take a lot longer to 'wake up' than the other two counters (it's easier to see if you set the buttons to something like 20 and 100000), which doesn't seem to make sense.