iMac Pro gets hot when in Sleep Mode

In sleep mode, normally the iMac remains relatively cold and can be waked up without any issues.

But last week running hot in sleep mode with unknown reason, however the iMac could be waked up normally.

Via activity monitor I've successfully managed to stop certain background programs, notably OneDrive, which I wasn't previously aware of they were running also in sleep mode.

Currently, everything seems to be functioning properly.