Still occurring in 19w42a - The fence is straight in this case and if the bees pushed long enough, the bees will dislodge and return to normal behavior before encountering the fence again.
https://gyazo.com/873daef4a3f281c633e8a431b39c6013
https://gyazo.com/d5eb67668b98a4a272619e04bb79a2f9
https://gyazo.com/1d40e5efe5ae5f7f5f55f94789538741
Still occurring in 19w42a - The fence is straight in this case and if the bees pushed long enough, the bees will dislodge and return to normal behavior before encountering the fence again.
https://gyazo.com/873daef4a3f281c633e8a431b39c6013
https://gyazo.com/d5eb67668b98a4a272619e04bb79a2f9
https://gyazo.com/1d40e5efe5ae5f7f5f55f94789538741