Len and buflen with resample

[gonche1124]

I´m building my first strategy that uses the resample functions of cerebro. I´m writing out the length and the buflen of each data feed in the next function. When I dont do any resampling, the result is as expected: len increments in every next step while buflen remains constant.
However, when I resample my data feed from 1 minute to 60 minutes, then the output for len and buflen is the same (both incrementing with each next call).
I´m trying to figure out what I´m doing wrong... here is my code:

def next(self):
      finalS=" "
             for i, d in enumerate(self.datas):
                 dt, dn, dv, dl, db = self.datetime.datetime(), d._name, d.open[0], len(d), d.buflen()
                 finalS=finalS+"|" + " {} {} {} {} {}".format(dt, dn, dv, dl, db)
             print(finalS)

And a snapshot of the output with one data feed:

And with resampling:

Thanks for the help!

[backtrader]

Resampled data cannot be preloaded, hence the difference.

[gonche1124]

Got it, thanks!