Galaxy S5 :: Call Waiting Not Working (Calls Disconnecting)

I am using my Samsung Galaxy S5 (Verizon) for my work and I recently noticed a flaw in the phone. Here is the scenario:

1) Dial a phone number and begin your call # 1.
2) While keeping the call # 1 active, ask someone to give you a call.
3) Accept the incoming call # 2, and speak for a few seconds.
4) Disconnect or 'End' the call # 2.
5) This will also end the call # 1 and you have lost both calls.

Here is another scenario:

1) Dial a phone number and begin your call # 1.
2) While keeping the call # 1 active, ask someone to give you a call.
3) Accept the incoming call # 2, and speak for a few seconds.
4) SWAP the calls from #2 to #1
5) End the call #1.
6) This will also end the call # 2 and you have lost both calls.

BOTTOM LINE: Disconnecting any one call during call waiting will automatically disconnect the other call as well.