BotInsight API (gettasklogdata) doesn't refresh the data for some unattended runners

I am facing an issue where gettasklogdata does not fetch bot information depending on the runner that executes it. There are three unattended runners; however, only one of them retrieves information from all bots. 

I checked the following points:

- For one specific bot, I can retrieve information when it is executed by all three runners. But only for this bot.

- When executed with an attended runner, I can retrieve the information for all bots.

- The unattended runners have the same roles.

What could be the problem?