We have identified an issue in AP&P 26.4 where switching to other invoice tabs can randomly make those tabs unresponsive, after clicking the External link icon. 

Issue Start: May 4, 2026

Impact Summary

After clicking the External link icon on the invoice view, 

Then attempt to click on any of these tabs, they do not respond randomly. 

This can only be reproduced on the latest 26.4 release. 

Workaround

While waiting for the permanent fix, you can close the middle frame which was opened by the external link icon. Then all the other tabs respond normally afterwards. 

Solution

This is an known issue reported to R&D with critical priority. The fix is targeted to 26.6 release and currently it is under validation. 

It is placed as a candidate to next possible MR release. 

The Support System Id is BWPB0048792. 

Further Support

If you would like to raise a case regarding this issue, please use this link: Support case