No. ONLY in case you send ALL sats, the channel is closed. It never shrink, only expand.

I think with splicing, when you use phoenix to send to an on chain address, you are reducing your channel size and therefore your liquidity. 

Scoresby

If you do not swap out all your sats, the channel is not reducing or closed.

Just leave a % in that channel and you always have the previous inbound liquidity.

lightning

Phoenix lightning wallet - questions on strategy for my use case

Signal312

If you do not swap out all your sats, the channel is not reducing or closed.
Just leave a % in that channel and you always have the previous inbound liquidity.