Not working TestSuite Result-Tab

sometimes we got the problem, that after executing a TestSuite (with running in 36 TestCases) the protocol using the ‘Result’-Tab on the TestSuite is empty! Inspecting the corresponding directory on filesystem, there are still file’s and a usable html-report!
We tested also to run the ‘failed’ TestCases singular, but all of them have a usable ‘Result’-Tab after running.We inspected also the “Report”-folders, and saw some difference (added as image to this topic)

Is there any protocol, wherin maybe is logged an error while creating the “Report”-folder?