Beta 4.8.0 op24 issues

I've been running 4.8.0-op24 on my Flint 2 with Wireguard Client - good results so far.
A few days ago, I added 3 websites to be excluded from the VPN.
This worked fine until this morning, when no VPN was on any device, despite the GUI saying it was.
I activated WG VPN via Luci - all clients got VPN - including IP's meant to be excluded.
After some testing, it looks like the culprit are those 3 excluded websites.
Once removed, I could control each devices VPN on/off.
All working again - but I can no longer exclude websites.
Is this a known fault?