I think it is the use of sauna that ban him from fighting and due to that, he was unable to defend his title twice which resulted in him being stripped of the title.
The bottom line is, that Casimero is having a weight problem issue that leads him to use the sauna. Aside from that, his camp was unaware of that policy under British Boxing Council. If only they are responsible, Casimero should be the one facing Inoue now. Don't want to happen the same situation with Jerwin Ancajas.
Back to topic, and as I previously posted
here, Ancajas camp admits that they overtrained Jerwin just to meet the required weight.
That's why to solve that, they will cut Ancajas' training volume as one of the options to make him perfectly in good condition on the day of the fight.
So it's really on the burden of the trainer of Jerwin, he needs to ensure that he won't overtrain and will just be in the peak condition right before the fight itself. Maybe they think that having training volumes will cut his weight, but I don't think that is a good idea.
Again, they've seen their mistakes and saw how Martinez fights. This will be enough for them to make the necessary adjustment in weight, training volume and strategy so that Jerwin can get his belt back and then aim for Ioka in the future for unification.
It's not a burden, it's his job and he is paid to do the job. They hire a capable one, so 90% of the time, they will achieve the desired result. Ancajas is trying to become a champion again, it's his only chance in this division, so he should make sure he will get a win and be reading for a possible trilogy.