Wi-Fi Connectivity Issues?

Anyone having Wi-Fi issues?

I have Auto Upload set on my f5+ and although sometimes it seems to upload my activities within a few minutes of finishing them, other times I've had to use the 'Sync' shortcut. However, it occurred to me that when it did seem to work, it could just have been that the actual upload was just happening over Bluetooth - I don't think there's any way of telling how an activity's being uploaded.

Using the Sync shortcut will often show 'Transferring' for ages, and if I try again will say "transfer in progress", which clears after a while, but I'm not sure if that's because it's been successful or failed.

If I go to Settings>Wi-Fi>Connect to Wi-Fi, sometimes it'll connect, other times it just keeps searching for the network (I'm about 1m away from my router).

I'm sure that there's at least some Wi-Fi connectivity taking place, but I can't find any trace of the devices MAC address anywhere in my router's DHCP logs.

I'm also wondering if there is an issue with Wi-Fi connectivity, could this be linked to the post-activity battery drain some of us are experiencing? Maybe the f5+ is spending a long time with the Wi-Fi active trying to upload the activity, whilst in the meantime it successfully does so over Bluetooth?