ngx-bootstrap BsModalRef closed the wrong Dropback

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Bug description:

Recently, I upgraded Angular from version 9 to version 15 and also synchronized ngx-bootstrap to version 10.3.0. After the upgrade, I noticed that when I use the bsModalService to consecutively display two components, the backdrop (overlay) doesn't appear for the second component. Upon examining my code, I found that the previous code was written as follows: bsModalService.show(AComponent). In the constructor of AComponent, I instantiated a private variable bsModalRef of type BsModalRef. Additionally, I imported InnerA in AComponent, and in the AComponent HTML file, I used <inner-a (onHide)="handleHide()">. In the constructor of InnerA, I also instantiated a private variable bsModalRef of type BsModalRef. At this point, when I trigger this.bsModalRef.hide() from InnerA, upon receiving the notification in AComponent, I trigger a message to display Component B. Now, if I call this.bsModalRef.hide() again in AComponent, it will close the backdrop for the upcoming Modal B, leaving only Component B without a backdrop.

After examining the source code, I found that in this scenario, the bsModalRef variable in AComponent is being used, and it closes the backdrop for Component B. The condition ModalCount === 1 in the source code leads to this issue. I believe this condition might not be reasonable in this case.