the predicted entity not end with 'E' tag

[hwaking]

i got the prediction like '[["1", "B_t_h"], ["9", "M_t_h"], ["4", "M_t_h"], ["0", "M_t_h"]]', the tag of number 0 should be 'E_t_h', is there any explation for this problem? and how can i fix the prediction?

and i also got the problem that all of the predictions most likely to predicted as 't_h', is there any good way to adjust it?

looking for your reply, thanks!