Could still be the signal strength.
When you tap the tile, you are telling the hub to look for the Fob.
When you just drive up the driveway, the fob is looking for the hub once every 30 seconds.
The difference is that as a directed command, The first is going to likely start right away and repeat a couple of times if needed. The second is just going to happen once every 30 seconds. They both might have a little trouble getting through, but hub to fob will very likely get through faster just because it repeats more frequently.
Fobs are generally, not just this device, not set up for frequent repeats because it will drain the battery life too fast. Obviously that’s not an issue with the hub, which is plugged into the mains.
There’s another issue that has to do with the routing table, but the solution is all the same. Try a repeater, to improve the signal strength strength that the fob detects when it is doing its normal check for the hub.