Cave spider spawners occasionally fail to generate

The bug

In mineshafts, cave spider spawners occasionally don't generate along with the cobweb. See attached screenshots.

Seed: -9144014475768710727

/tp @s -2398 39 872 -82 16

/tp @s -2364 9 939 -180 0

/tp @s 1029 20 707 -126 18