Vantage 6.10.543 PO release qty issue

We have started seeing an issue in the last month or so when updating PO's...we change the PO release qty and when we come back out to thePO main screen it is not reflecting the change. Nor does it reflect in time phase...yet it shows within the line as the correct release amount and the PO prints correctly. Has anyone else seen this issue? We have been at this release for years.