Gold blocks may fail to generate in bastion remnants

The bug:
Bastion remnants may fail to generate gold blocks in certain places.
How to reproduce this issue:
The seed used in reproducing this issue is: 1086657978864571848.
The coordinates of the bastions are: (These are all treasure bastions, which make reproducing this issue easier)
-96 -80
16 -80
64 32
-80 80
Teleport to each of the coordinates and go to the back of the upper rampart, which contains gold blocks, which is usually at y=80 or above. Entering in spectator mode may be necessary.
Observed Result:
The upper rampart contains less than 7 gold blocks per half. Some gold blocks are replaced by air, polished blackstone, cracked polished blackstone, or just blackstone. Correct me if I am wrong.
Expected Result:
The upper rampart should contain 7 gold block per half.