Yes, only once. And it returns to your on chain wallet, worst case you pay some fees, which were reserved at channel creation.
Discussion
It can get worse. If it is an older channel (or nin-anchor), the fee you reserved might have been at stupid small amounts. The channel close tx is basically buried under 700mb of horseshit, and is stuck until mempools clear or you sacrifice hundreds of thousands of sats to an accelerator.
I guess I'm lucky. 4 years of node running only one foced close. My brothers node... main liquidity ones no issues.