cauldron bug

Tenderboileds take 100l of water, and 2 runs of full fuel in the cauldron.
However, sometimes, it does not even finish after the two runs.
This is the third time this happened now, seems to be some random error:
I added 100l water and tenderboileds, plus 10 branches (100% fuel)
I lit the cauldron, and let it burn out. I then added another 10 branches, and lit again.
Now it's burned out, but the tenderboileds did not pop to being finished, they are at 99%
Putting in another 10l of water and 2 branches, then lighting, insta-pops them to being finished as soon as it's lit.
However, sometimes, it does not even finish after the two runs.
This is the third time this happened now, seems to be some random error:
I added 100l water and tenderboileds, plus 10 branches (100% fuel)
I lit the cauldron, and let it burn out. I then added another 10 branches, and lit again.
Now it's burned out, but the tenderboileds did not pop to being finished, they are at 99%
Putting in another 10l of water and 2 branches, then lighting, insta-pops them to being finished as soon as it's lit.