When looking over build history or old builds I saw build durations of e.g. 21min, although I know it typically lasts about 6 to 12min. It turned out that there was a ~8min waiting period for a resource lock...

The classic UI's "Stage View" actually shows this waiting in small:

However I was wondering if this should be also reflected here:

Log snippet:

...
[Pipeline] lock
10:00:30 Trying to acquire lock on [Label: PhpStorm, Quantity: 1]
10:00:30 Found 0 available resource(s). Waiting for correct amount: 1.
10:00:30 [Label: PhpStorm, Quantity: 1] is locked, waiting...
10:08:31 Lock acquired on [Label: PhpStorm, Quantity: 1]
[Pipeline] {
...