# BP Workaround Referenced in UE-81377 Crashes **URL:** \ **Category:** XR Development\ **Tags:** SteamVR, Vive, spectator, unreal-engine, crash, question\ **Created:** [December 10, 2019, 5:43pm UTC](https://forums.unrealengine.com/t/bp-workaround-referenced-in-ue-81377-crashes/459336 "2019-12-10T17:43:36Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![anonymous\_user\_1dd0dd37](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_1dd0dd37](https://forums.unrealengine.com/u/anonymous_user_1dd0dd37)\ **Post date:** [December 10, 2019, 5:43pm UTC](https://forums.unrealengine.com/t/bp-workaround-referenced-in-ue-81377-crashes/459336/1 "2019-12-10T17:43:36Z")
The BP workaround in the developer notes in [UE-81377](https://issues.unrealengine.com/issue/UE-81377) causes packaged games to crash on use of the alt+tab command. As far as I can tell this bug is breaking VR spectator views for Vive headsets in UE 4.23+. This is not great for product demos: especially at trade shows and such. I really wish it weren’t backlogged. ---
**Author:** ![anonymous\_user\_935088b3](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_935088b3](https://forums.unrealengine.com/u/anonymous_user_935088b3)\ **Post date:** [December 12, 2019, 9:43pm UTC](https://forums.unrealengine.com/t/bp-workaround-referenced-in-ue-81377-crashes/459336/2 "2019-12-12T21:43:01Z")
Hello, We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue. [https://epicsupport.force.com/unrealengine/s/](https://epicsupport.force.com/unrealengine/s/) Thanks