Have no fear – the stats listed in the item help text for Ohtas is indeed correct. However, as some have already mentioned in the thread, I believe there may be a misunderstanding about the how this stat works versus how it is displayed.

The "Regain +10" is based off of 10/1000, not off of the 100 scale of TP, meaning that your automaton’s TP will increase by 1 every 3 seconds. The past bug involving Burattinaios increased 10 TP every three seconds and this was corrected to be 1 TP every 3 seconds.

Hopefully this clear up any confusion!