I would expect them not to have voted Lib Dem this time around. The Brexit split wasn't along traditional left/right trends - many Tories would be happy to have remained, and possibly to rejoin.Yes, this could be a side affect of that protest voting shift.....
Note: I do add however, that if those disaffected Cons who voted LD got a whiff that the LD could get get power... the one policy that would possibly see them jump back to the Cons is the LD policy of attempting a rejoin of the EU.