ACPI error message after S4

Hello, I'm the new guy and have a question.
I had to restart OMV 4 and now if the computer is running for longer than 15 minutes I get
sleeps, following error message:
acpi: hardware changed while hibernated, success doubtful!
My hardware:
Motherboard: Asus H81i-Plus
CPU: Intel Core i3-4130 Haswell-DT
GPU: Intel HD Graphics 4400
Memory: 8 GB
I can't see any errors in the log files.
Is this error message relevant and how can I possibly suppress it?
Please excuse my bad English