Confusing event confirmation emails

[Upperholme]

I've started using this extension on a Civi 5.10.x and in general it seems to be doing the trick. However I've noticed some odd behaviour with respect to email receipts. Here's the scenario:
We running two events (A and B), and using the extension have made it possible to register for event B from the registration form for event A. It's also possible to independently register for event B as a stand alone. The confirmation email is turned on for both events. Both events are set up to allow mutiple registrations.

In testing, I've registered three people as a multiple registration for event A, and opted to register for event B at the same time. The first participant (me) received one email setting out corectly allof the participants and the registrations. Excellent.

The second and third participants were each sent two confirmation emails: the first was their receipt for event A, and correctly showed that they were also registered for event B. All good. The second email confirmed that they were registered for event B and gave the price for that registration as the total price for event A and B added. Very confusing.

[elisseck]

@Upperholme sorry this seems to not have been reviewed and it's quite an old issue. Are you still experiencing this issue or has it changed at all with core changes in the last few years?