After building bee farm on nether bees wont come out of their beehives (they did at the first). Tried placing flowers one further from the bee entrance, no change. After downloading a backup into local it works perfectly and bees come out as expected. Also sound effect of bees working remains in the subtitles. 

Built the farm and it was working while i was alone in the server. Left to gather sand and someone else logged in, that is when i first noticed the issue.

Steps to reproduce:

Log in alone to realms server

Place beehive with three bees in nether on realms server.

Enclose in glass and put flowers in enclosure.

Bees should be coming out at this point.

Leave and then have someone else log in.

Bees stop coming out.

To check that it works normally download world backup and open in single player mode.

Edit: Issue seems to be related to multiple players being connected. After I disconnected from the realm from a couple hours and came back when there was no one else connected the bees were ale to get out once again.