realtime data modules not initialising

[AntonioGargaro]

Type of issue

Bug

Description

A recent upgrade to v9.18 on our customer's site has stopped initialising the Permutive RTD module.
Site: https://www.techspot.com/community/?pbjs_debug=true

It is logged that our RTD module is not loading:

The module is installed and included:

I performed some debugging of Prebid bundle and found that this line is the culprit as it is empty at the point initSubModules() is called on this line.

The attachRealTimeDataProvider() appears to be called after the initialisation which I'm assuming is because it's an async hook?

I did a little more debugging and found that registering of the submodule happens before the realtime data module inits, so I suspect that it should be registered but just is not.

Steps to reproduce

Visit site: https://www.techspot.com/community/?pbjs_debug=true

Observe the log that the submodule doesn't load.

Expected results

Submodule should load

Actual results

Submodule does not load

Platform details

Other information

Another customer's site on Prenid v9.12 appears to load the submodule correctly.