[BUG] buffer_with_time_or_count lost some data about rxpy

[matiboy]

Hi @fanck0605 Thank you for opening this issue;
This seems quite similar to #694 and appears to be a threading issue. Using an event loop scheduler should solve the problem:

from reactivex.scheduler import EventLoopScheduler
event_loop = EventLoopScheduler()
result = []
reactivex.range(100_000).pipe(
    operators.buffer_with_time_or_count(timespan=0.001, count=10_000),
).subscribe(on_next=lambda x: result.extend(x), scheduler=event_loop)
assert result == list(range(100_000))

Hope this helps