The data_out_start(1302) messages could be from different settings from the initiator and target.

Check to make sure that they match. From the iSCSI-R3 server go to the Console screen and enter CTRL + ALT + W then select Tuning Options then iSCSI daemon options select option 1 and choose target and compare the setting to match from the initiator.

Some claim that these are the preferred settings when working with VMware:

maxRecvDataSegmentLen=262144
MaxBurstLength=16776192
Maxxmitdatasegment=262144
maxoutstandingr2t=8
InitialR2T=No
ImmediateData=Yes

Concerning problems with the console not performing correctly, this could be a hardware issue but hard to tell without logs. Run a memory check, to do this restart the system and after POST enter the "Escape or TAB" key and select MEMtest. This will take some time (usually wait for 1 hour) but I have seen this before in some cases.

If you are still receiving these errors please send logs to support@open-e.com to have an engineer review them.