Keep in mind and everyone else dangers of time lock feature.
It could become obsolete before your time lock will end, rendering your BTC lost.
Fork could happen hard/soft and many more that we can't even predict.
That's theoretically possible but really unlikely.
This is how Adam Back put it a few years ago, and I think he's correct:
Obviously no fork with widespread approval will ever destroy any timelocked bitcoins.
It's more likely the wallet for forked coin is buggy, i've seen few people have hard time redeem forked coins from multi-sig address or P2SH address with custom script.