JLP Tokens missing on Yield Yak / Metamask

I recently staked AVAX/JOE for JLP tokens on Yield Yak, and my Metamask balance of JLP now says 0. Is this because of impermanent loss, or is something wrong with my wallet? When I go to Markr.io, it says I have $864 locked into JLP, which is about $300 less than when I staked it. If it is due to impermanent loss, will the JLP tokens be available for withdrawal when the price gets back to where I started?

Thank you,