Subgrid pop up issue

Hi Guys,

In sandbox there is no issue.

But in Live, when a record is double clicked on a subgrid, a new window opens and the record on the forms ribbon has disappeared.

The URL says:

main.aspx?etc=1089&extraqs=%3f_CreateFromId%3d%257b0AED44F6-2253-E611-80E5-5065F38ADA61%257d%26_CreateFromType%3d1088%26_gridType%3d1089%26etc%3d1089%26id%3d%257b0CED44F6-2253-E611-80E5-5065F38ADA61%257d%26rskey%3d%257bC1949622-3732-E611-80DF-5065F38ADA91%257d&histKey=436639598&newWindow=true&pagetype=entityrecord&rskey=%7bC1949622-3732-E611-80DF-5065F38ADA91%7d

Has anybody experience this issue before?