Hi, everyone,
I noticed the following situation in one of Story at night or early in the morning the Original estimate was increased on my behalf.

I changed the Original estimate, but it increased again


I checked the values of the estimates of the child issues, but they do not have such large values.
This is the first and only case among many issues, and this has never happened before.
I would be very grateful for your help or a hint on where to look for the cause.