Yup same issue. This one's new to beta 3. thx again I suppose they might have changed something with bluetooth in this build that's causing the other devices to fail to see each other. Handoff on my iPhone to mac also having some difficulties however vice-versa works.
Handoff works perfectly for me. The only time I have an issue with when for whatever reason, my phone switches from the primary wifi network to the "guest" network... then, of course, it fails because my rMPB and iPhone are on different wifi networks. Apart from that, handoff for both calls and texts (iMessage and SMS/MMS) is flawless.