[Feedback] Error in field criteria

[Feedback] Error in field criteria

In my TradeMaster (which has been shared to Support), there is a Form "Test Reports". It contains a field "MTA_PO". I have set the criteria (zoho.currentdate - '5W:0D:0H:0M:0S').
However, whenever I edit the field properties, the criteria will be corrupt and become (zoho.currentdate - \)

Once this happens, I will not even be able to save the properties.
Please check why.
Thanks.