Lots of Qt::BuildLock output

Hi,

we upgraded our build environment to Visual Studio 2019 with the latest Qt Visual Studio Tools and Qt/MsBuild a few months ago and since then we get Qt::BuildLock messages in our build output.

...\AppData\Local\QtMsBuild\qt_globals.targets(131,5): warning : Qt::BuildLock[\{E42AFBC7-0C5E-441F-B1DB-AE4C9E75F86E}]: Waiting...

Sometimes when building incrementally there is just a wall of Qt::BuildLock messages in the output and it seems to be stuck in a loop or something.

I was told to provide a msbuild binary log. The log was created with a smaller solution (99 projects) than our usual solution (over 200 projects) to keep the log small. I had no buildlocks when trying even smaller solutions so it's still pretty big. The log has only a few Qt::BuildLock messages, the wall of Qt::BuildLock messages did not happen when i tried to reproduce the behaviour.

It's too big to attach it directly so here is a dropbox link: https://www.dropbox.com/s/3rj3zuf7n2wyhvu/msbuild.binlog?dl=0