C4Builder command never terminates

[ryan-payet-wcc]

C4Builder command (version 0.2.16) never terminates and have to do Ctrl-C to close.
This causes timeout issues when used in a DevOps CI/Cd pipelines.
Command works and build the docs as expected, but then just hangs after it is done,

[ryan-payet-wcc]

From further testing, this issue only happens when generating PDF. Might be relates to issue #76